The population health approach A qualitative study of. Rather than a list of names, only a count of individuals is sought. The second source of data would be a “representative” survey of the population. The sample may not actually be representative, it may be more cost-effective than using an approach that requires two data sources., One of the most common types of nonprobability sample is called a convenience sample – not because such samples are necessarily easy to recruit, but because the researcher uses whatever individuals are available rather than selecting from the entire population..

### Statistical judgments are influenced by the implied

What are the advantages of using a simple random sample to. Research studies are usually carried out on sample of subjects rather than whole populations. The most challenging aspect of fieldwork is drawing a random sample from the target population to which the results of the study would be generalized. In actual practice, the task is so difficult that some, Research studies are usually carried out on sample of subjects rather than whole populations. The most challenging aspect of fieldwork is drawing a random sample from the target population to which the results of the study would be generalized. In actual practice, the task is so difficult that some.

can be referred to as generalizing to theory rather than generalizing to a population. This approach normally utilises a non-probability sampling method, in which the sample is chosen in such a way as to facilitate this process of generating or refining theoretical insights. Non-probability samples are The population health approach recognizes that health is a capacity or resource rather than a state, a definition which corresponds more to the notion of being able to pursue one's goals, to acquire skills and education, and to grow.

The sample elements are chosen from the population by nonrandom methods. These methods are more likely to produce a biased sample than the random methods. Investigator cannot estimate that each element of the population will be included in the sample. Restricts ability to generalize findings Most nursing research use this Lee Mobley writes: I recently read what you posted on your blog How does statistical analysis differ when analyzing the entire population rather than a sample?. What you said in the blog accords with my training in econometrics. However I am concerned about a new wrinkle on this problem that derives from multilevel modeling.

Simple random sample advantages include ease of use and accuracy of representation. No easier method exists to extract a research sample from a larger population than simple random sampling. There As it is dangerous to make inferences about the target population on the basis of a non-probability sample, non-probability methodology is often used to test aspects of a survey such as questionnaire design, processing systems etc. rather than make inferences about the target population.

Rather than assume parenting is an innate characteristic, it should be framed as a learnable skill set that varies across the population and can be supported, strengthened and enhanced regardless of a parent's current proficiency (a representative sample of Australian families), A population approach seeks to employ multiple, Statistical Approach to Determining Sample Size Marketing Research Assignment and Online Homework Help Several qualitative factors should also be taken into consideration when determining the sample size, The statistically determined sample size is the net o. In some cases. precision is specified in relative rather than absolute terms.

can be referred to as generalizing to theory rather than generalizing to a population. This approach normally utilises a non-probability sampling method, in which the sample is chosen in such a way as to facilitate this process of generating or refining theoretical insights. Non-probability samples are increases as πs approach 50%. Thus, normatively, one should be more confident that a sample with a percentage of 10% came from a π = 18%, rather than a π = 2%, population than that a 40% sample came from a π = 48%, rather than a π = 32%, population, even though the sample percentages are equidistant from the population πs in both cases.

set of summary statistics computed from this sample. Second, population size histories that are consistent with these observed summary statistics are inferred by intensive simulations rather than by complex (and generally intractable) mathematical derivations. ABC is a popular approach in population genetics, which has already population parameters or the testing of hypotheses. The use of non-probability samples is sometimes carried out with the (usually implied) justification that estimates derived from the sample may be linked to some hypothetical universe of elements rather than to a real population. This justification may lead to

can be referred to as generalizing to theory rather than generalizing to a population. This approach normally utilises a non-probability sampling method, in which the sample is chosen in such a way as to facilitate this process of generating or refining theoretical insights. Non-probability samples are Statistical Approach to Determining Sample Size Marketing Research Assignment and Online Homework Help Several qualitative factors should also be taken into consideration when determining the sample size, The statistically determined sample size is the net o. In some cases. precision is specified in relative rather than absolute terms.

population parameters or the testing of hypotheses. The use of non-probability samples is sometimes carried out with the (usually implied) justification that estimates derived from the sample may be linked to some hypothetical universe of elements rather than to a real population. This justification may lead to population parameters or the testing of hypotheses. The use of non-probability samples is sometimes carried out with the (usually implied) justification that estimates derived from the sample may be linked to some hypothetical universe of elements rather than to a real population. This justification may lead to

### Total population sampling Lжrd Dissertation

Advantages and disadvantages of using population and. One of the most common types of nonprobability sample is called a convenience sample – not because such samples are necessarily easy to recruit, but because the researcher uses whatever individuals are available rather than selecting from the entire population., The basic theory and methods of probability sampling from finite populations were largely developed during the first half of the twentieth century, motivated by the desire to use samples rather than censuses to characterize human, business, and agricultural populations..

Inferring population size history from large samples of. can be referred to as generalizing to theory rather than generalizing to a population. This approach normally utilises a non-probability sampling method, in which the sample is chosen in such a way as to facilitate this process of generating or refining theoretical insights. Non-probability samples are, CHAPTER 3 Research design, research method and population 3.1 INTRODUCTION money was saved by selecting a sample to be studied rather than attempting to study the entire population of women who requested TOP services. population. 3.5.4 Sample size.

### Inferring population size history from large samples of

Statistical Approach to Determining Sample Size Marketing. Rather than a list of names, only a count of individuals is sought. The second source of data would be a “representative” survey of the population. The sample may not actually be representative, it may be more cost-effective than using an approach that requires two data sources. https://en.m.wikipedia.org/wiki/Bessel%27s_correction Sample surveys involve the collection of data from a sample of the target population rather than all individuals in the target population. The key advantage of the sample survey is that less data need to be collected and analysed. A key assumption of the sample survey is that the sample is representative of the target population as a whole..

A population may be studied using one of two approaches: taking a census, or selecting a sample. It is important to note that whether a census or a sample is used, both provide information that can be used to draw conclusions about the whole population. Lee Mobley writes: I recently read what you posted on your blog How does statistical analysis differ when analyzing the entire population rather than a sample?. What you said in the blog accords with my training in econometrics. However I am concerned about a new wrinkle on this problem that derives from multilevel modeling.

Sometimes the task is one of estimating a population value from a sample mean, rather than testing hypotheses. For example, suppose from a sample of 100 farmers it is found that their average monthly purchases of the Insecticide Bugdeath were 10.5 litres. increases as πs approach 50%. Thus, normatively, one should be more confident that a sample with a percentage of 10% came from a π = 18%, rather than a π = 2%, population than that a 40% sample came from a π = 48%, rather than a π = 32%, population, even though the sample percentages are equidistant from the population πs in both cases.

Why Sample? Sampling is done in a wide variety of research settings. Listed below are a few of the benefits of sampling: Reduced cost: It is obviously less costly to obtain data for a selected subset of a population, rather than the entire population. One of the most common types of nonprobability sample is called a convenience sample – not because such samples are necessarily easy to recruit, but because the researcher uses whatever individuals are available rather than selecting from the entire population.

The population health approach recognizes that health is a capacity or resource rather than a state, a definition which corresponds more to the notion of being able to pursue one's goals, to acquire skills and education, and to grow. As it is dangerous to make inferences about the target population on the basis of a non-probability sample, non-probability methodology is often used to test aspects of a survey such as questionnaire design, processing systems etc. rather than make inferences about the target population.

Statistical Approach to Determining Sample Size Marketing Research Assignment and Online Homework Help Several qualitative factors should also be taken into consideration when determining the sample size, The statistically determined sample size is the net o. In some cases. precision is specified in relative rather than absolute terms. increases as πs approach 50%. Thus, normatively, one should be more confident that a sample with a percentage of 10% came from a π = 18%, rather than a π = 2%, population than that a 40% sample came from a π = 48%, rather than a π = 32%, population, even though the sample percentages are equidistant from the population πs in both cases.

Sample surveys involve the collection of data from a sample of the target population rather than all individuals in the target population. The key advantage of the sample survey is that less data need to be collected and analysed. A key assumption of the sample survey is that the sample is representative of the target population as a whole. Sometimes the task is one of estimating a population value from a sample mean, rather than testing hypotheses. For example, suppose from a sample of 100 farmers it is found that their average monthly purchases of the Insecticide Bugdeath were 10.5 litres.

can be referred to as generalizing to theory rather than generalizing to a population. This approach normally utilises a non-probability sampling method, in which the sample is chosen in such a way as to facilitate this process of generating or refining theoretical insights. Non-probability samples are De ning the Study Population for an Observational Study to Ensure Su cient Overlap: A Tree Approach The framework we use is that of [25]. We have a random sample of size Nfrom a large population. For each subject iin the sample, let D idenote whether or over a subpopulation rather than the whole population has two e ects on the

set of summary statistics computed from this sample. Second, population size histories that are consistent with these observed summary statistics are inferred by intensive simulations rather than by complex (and generally intractable) mathematical derivations. ABC is a popular approach in population genetics, which has already set of summary statistics computed from this sample. Second, population size histories that are consistent with these observed summary statistics are inferred by intensive simulations rather than by complex (and generally intractable) mathematical derivations. ABC is a popular approach in population genetics, which has already

## What is the Population Health Approach? Canada.ca

A Bibliography of Selected Statistical Methods and. Combining integration of care with the population health approach can be supported by a set of cohesive strategies and interventions aimed at Taking a population rather than an individual The type and the level of evidence on the effectiveness of these interventions are limited and uneven across this sample of …, Lee Mobley writes: I recently read what you posted on your blog How does statistical analysis differ when analyzing the entire population rather than a sample?. What you said in the blog accords with my training in econometrics. However I am concerned about a new wrinkle on this problem that derives from multilevel modeling..

### Statistical judgments are influenced by the implied

How does statistical analysis differ when analyzing the. A Resampling Approach for Under-estimating a Finite Population Total from a Censored Sample Norbert Gaffke* and Andreas Zo¨llner Faculty of Mathematics, University of Magdeburg, Magdeburg, Germany ABSTRACT sample is censorized rather than random. Despite that, a reliable, it is better to contact the entire population (a census) rather than only a sample of the population. As Kish (1979) (2) has pointed out, censuses, if done correctly, have the potential advantage of providing precise, detailed, and credible information on all population units. On the other hand, samples have the advantage of providing richer.

set of summary statistics computed from this sample. Second, population size histories that are consistent with these observed summary statistics are inferred by intensive simulations rather than by complex (and generally intractable) mathematical derivations. ABC is a popular approach in population genetics, which has already Systematic sampling is the likelihood of achieving a targeted outcome rather than letting the random data method in which a random sample from a larger population is

Sometimes the task is one of estimating a population value from a sample mean, rather than testing hypotheses. For example, suppose from a sample of 100 farmers it is found that their average monthly purchases of the Insecticide Bugdeath were 10.5 litres. Sometimes the task is one of estimating a population value from a sample mean, rather than testing hypotheses. For example, suppose from a sample of 100 farmers it is found that their average monthly purchases of the Insecticide Bugdeath were 10.5 litres.

C h a p t e r o n e Population-Based Survey Experiments he population represented by the sample should be representative of the population to which the researcher intends to extend his or her indings. tal methods, but these were conceived of as alternative rather than syn Rather than a list of names, only a count of individuals is sought. The second source of data would be a “representative” survey of the population. The sample may not actually be representative, it may be more cost-effective than using an approach that requires two data sources.

Combining integration of care with the population health approach can be supported by a set of cohesive strategies and interventions aimed at Taking a population rather than an individual The type and the level of evidence on the effectiveness of these interventions are limited and uneven across this sample of … 7/2/2014 · Findings: Core elements of the population health approach included focusing on health and wellness rather than illness, taking a population rather than individual orientation, understanding needs and solutions through community outreach, addressing health disparities/health in vulnerable groups, addressing the social determinants of health and inter-sectoral action and partnerships.

I happen to have the entire population rather than a sample. I’m basically interested in the relationship between case outcomes and certain features (e.g., time, the appearance of certain words or phrases in the opinion, The probability model of outcomes approach is better developed. set of summary statistics computed from this sample. Second, population size histories that are consistent with these observed summary statistics are inferred by intensive simulations rather than by complex (and generally intractable) mathematical derivations. ABC is a popular approach in population genetics, which has already

The population health approach recognizes that health is a capacity or resource rather than a state, a definition which corresponds more to the notion of being able to pursue one's goals, to acquire skills and education, and to grow. CHAPTER 3 Research design, research method and population 3.1 INTRODUCTION money was saved by selecting a sample to be studied rather than attempting to study the entire population of women who requested TOP services. population. 3.5.4 Sample size

Lee Mobley writes: I recently read what you posted on your blog How does statistical analysis differ when analyzing the entire population rather than a sample?. What you said in the blog accords with my training in econometrics. However I am concerned about a new wrinkle on this problem that derives from multilevel modeling. observing codes in the interviews than on the number of codes in a population Quantitative Determination of Saturation: Rijnsoever, 2017 Sample size, n, to achieve saturation (with 95% confidence) vs probability of observing codes in the interviews, for differing number of codes in the population random sampling minimal information maximal

Rather than a list of names, only a count of individuals is sought. The second source of data would be a “representative” survey of the population. The sample may not actually be representative, it may be more cost-effective than using an approach that requires two data sources. Combining integration of care with the population health approach can be supported by a set of cohesive strategies and interventions aimed at Taking a population rather than an individual The type and the level of evidence on the effectiveness of these interventions are limited and uneven across this sample of …

A population may be studied using one of two approaches: taking a census, or selecting a sample. It is important to note that whether a census or a sample is used, both provide information that can be used to draw conclusions about the whole population. A population may be studied using one of two approaches: taking a census, or selecting a sample. It is important to note that whether a census or a sample is used, both provide information that can be used to draw conclusions about the whole population.

ACC 414 CH 9. STUDY. When more than a few misstatements are detected using MUS approach, the sample calculations as shown in the textbook may overstate the allowance for the population of shipping documents rather than sales invoices is the appropriate population for drawing the sample. Define the sampling unit MUS. An individual dollar Bias in surveys is undesirable, but often unavoidable. The major types of bias that may occur in the sampling process are: Non-response bias: When individuals or households selected in the survey sample cannot or will not complete the survey there is the potential for bias to result from this non-response.Nonresponse bias occurs when the observed value deviates from the population parameter

A population may be studied using one of two approaches: taking a census, or selecting a sample. It is important to note that whether a census or a sample is used, both provide information that can be used to draw conclusions about the whole population. The basic theory and methods of probability sampling from finite populations were largely developed during the first half of the twentieth century, motivated by the desire to use samples rather than censuses to characterize human, business, and agricultural populations.

ACC 414 CH 9. STUDY. When more than a few misstatements are detected using MUS approach, the sample calculations as shown in the textbook may overstate the allowance for the population of shipping documents rather than sales invoices is the appropriate population for drawing the sample. Define the sampling unit MUS. An individual dollar ACC 414 CH 9. STUDY. When more than a few misstatements are detected using MUS approach, the sample calculations as shown in the textbook may overstate the allowance for the population of shipping documents rather than sales invoices is the appropriate population for drawing the sample. Define the sampling unit MUS. An individual dollar

Combining integration of care with the population health approach can be supported by a set of cohesive strategies and interventions aimed at Taking a population rather than an individual The type and the level of evidence on the effectiveness of these interventions are limited and uneven across this sample of … Lee Mobley writes: I recently read what you posted on your blog How does statistical analysis differ when analyzing the entire population rather than a sample?. What you said in the blog accords with my training in econometrics. However I am concerned about a new wrinkle on this problem that derives from multilevel modeling.

observing codes in the interviews than on the number of codes in a population Quantitative Determination of Saturation: Rijnsoever, 2017 Sample size, n, to achieve saturation (with 95% confidence) vs probability of observing codes in the interviews, for differing number of codes in the population random sampling minimal information maximal Lee Mobley writes: I recently read what you posted on your blog How does statistical analysis differ when analyzing the entire population rather than a sample?. What you said in the blog accords with my training in econometrics. However I am concerned about a new wrinkle on this problem that derives from multilevel modeling.

$\begingroup$ Thank you so much for answering my question I just want to recap here so the advantages for a population is that all your data would be right there. As long as you have the time and money. And the disadvantage would be costly and time consuming. Advantages of a sample is it is easier and more possible to collect the data by using a subset rather than the whole population and it CHAPTER 3 Research design, research method and population 3.1 INTRODUCTION money was saved by selecting a sample to be studied rather than attempting to study the entire population of women who requested TOP services. population. 3.5.4 Sample size

Bias in surveys is undesirable, but often unavoidable. The major types of bias that may occur in the sampling process are: Non-response bias: When individuals or households selected in the survey sample cannot or will not complete the survey there is the potential for bias to result from this non-response.Nonresponse bias occurs when the observed value deviates from the population parameter b) The probability that more than 35% of UCLA students have travelled outside the US is 0.0708. c) If in fact the true population proportion of UCLA students who have travelled outside the US is greater than 0.35, the probability of getting a random sample where the sample proportion is …

### Total population sampling Lжrd Dissertation

Population-Sequencing as a Biomarker for Sample. set of summary statistics computed from this sample. Second, population size histories that are consistent with these observed summary statistics are inferred by intensive simulations rather than by complex (and generally intractable) mathematical derivations. ABC is a popular approach in population genetics, which has already, Rather than a list of names, only a count of individuals is sought. The second source of data would be a “representative” survey of the population. The sample may not actually be representative, it may be more cost-effective than using an approach that requires two data sources..

Sampling from finite populations Encyclopedia of Mathematics. CHAPTER 3 Research design, research method and population 3.1 INTRODUCTION money was saved by selecting a sample to be studied rather than attempting to study the entire population of women who requested TOP services. population. 3.5.4 Sample size, As it is dangerous to make inferences about the target population on the basis of a non-probability sample, non-probability methodology is often used to test aspects of a survey such as questionnaire design, processing systems etc. rather than make inferences about the target population..

### Family Matters Issue 100 - A population approach to the

Total population sampling Lжrd Dissertation. Sometimes the task is one of estimating a population value from a sample mean, rather than testing hypotheses. For example, suppose from a sample of 100 farmers it is found that their average monthly purchases of the Insecticide Bugdeath were 10.5 litres. https://en.m.wikipedia.org/wiki/Bessel%27s_correction Bias in surveys is undesirable, but often unavoidable. The major types of bias that may occur in the sampling process are: Non-response bias: When individuals or households selected in the survey sample cannot or will not complete the survey there is the potential for bias to result from this non-response.Nonresponse bias occurs when the observed value deviates from the population parameter.

increases as πs approach 50%. Thus, normatively, one should be more confident that a sample with a percentage of 10% came from a π = 18%, rather than a π = 2%, population than that a 40% sample came from a π = 48%, rather than a π = 32%, population, even though the sample percentages are equidistant from the population πs in both cases. $\begingroup$ Thank you so much for answering my question I just want to recap here so the advantages for a population is that all your data would be right there. As long as you have the time and money. And the disadvantage would be costly and time consuming. Advantages of a sample is it is easier and more possible to collect the data by using a subset rather than the whole population and it

can be referred to as generalizing to theory rather than generalizing to a population. This approach normally utilises a non-probability sampling method, in which the sample is chosen in such a way as to facilitate this process of generating or refining theoretical insights. Non-probability samples are One of the most common types of nonprobability sample is called a convenience sample – not because such samples are necessarily easy to recruit, but because the researcher uses whatever individuals are available rather than selecting from the entire population.

Rather than a list of names, only a count of individuals is sought. The second source of data would be a “representative” survey of the population. The sample may not actually be representative, it may be more cost-effective than using an approach that requires two data sources. 7/2/2014 · Findings: Core elements of the population health approach included focusing on health and wellness rather than illness, taking a population rather than individual orientation, understanding needs and solutions through community outreach, addressing health disparities/health in vulnerable groups, addressing the social determinants of health and inter-sectoral action and partnerships.

Research studies are usually carried out on sample of subjects rather than whole populations. The most challenging aspect of fieldwork is drawing a random sample from the target population to which the results of the study would be generalized. In actual practice, the task is so difficult that some b) The probability that more than 35% of UCLA students have travelled outside the US is 0.0708. c) If in fact the true population proportion of UCLA students who have travelled outside the US is greater than 0.35, the probability of getting a random sample where the sample proportion is …

The population health approach recognizes that health is a capacity or resource rather than a state, a definition which corresponds more to the notion of being able to pursue one's goals, to acquire skills and education, and to grow. can be referred to as generalizing to theory rather than generalizing to a population. This approach normally utilises a non-probability sampling method, in which the sample is chosen in such a way as to facilitate this process of generating or refining theoretical insights. Non-probability samples are

Combining integration of care with the population health approach can be supported by a set of cohesive strategies and interventions aimed at Taking a population rather than an individual The type and the level of evidence on the effectiveness of these interventions are limited and uneven across this sample of … Rather than assume parenting is an innate characteristic, it should be framed as a learnable skill set that varies across the population and can be supported, strengthened and enhanced regardless of a parent's current proficiency (a representative sample of Australian families), A population approach seeks to employ multiple,

ACC 414 CH 9. STUDY. When more than a few misstatements are detected using MUS approach, the sample calculations as shown in the textbook may overstate the allowance for the population of shipping documents rather than sales invoices is the appropriate population for drawing the sample. Define the sampling unit MUS. An individual dollar Rather you may want to use a sample of oranges and count the number of black spots in that sample. An important thing to keep in mind is that, what is a population and what is a sample, are very context driven questions. Something, which is a sample, in one situation, maybe a population in some other situation.

Rather than a list of names, only a count of individuals is sought. The second source of data would be a “representative” survey of the population. The sample may not actually be representative, it may be more cost-effective than using an approach that requires two data sources. ACC 414 CH 9. STUDY. When more than a few misstatements are detected using MUS approach, the sample calculations as shown in the textbook may overstate the allowance for the population of shipping documents rather than sales invoices is the appropriate population for drawing the sample. Define the sampling unit MUS. An individual dollar

One of the most common types of nonprobability sample is called a convenience sample – not because such samples are necessarily easy to recruit, but because the researcher uses whatever individuals are available rather than selecting from the entire population. observing codes in the interviews than on the number of codes in a population Quantitative Determination of Saturation: Rijnsoever, 2017 Sample size, n, to achieve saturation (with 95% confidence) vs probability of observing codes in the interviews, for differing number of codes in the population random sampling minimal information maximal

ACC 414 CH 9. STUDY. When more than a few misstatements are detected using MUS approach, the sample calculations as shown in the textbook may overstate the allowance for the population of shipping documents rather than sales invoices is the appropriate population for drawing the sample. Define the sampling unit MUS. An individual dollar The basic theory and methods of probability sampling from finite populations were largely developed during the first half of the twentieth century, motivated by the desire to use samples rather than censuses to characterize human, business, and agricultural populations.

population parameters or the testing of hypotheses. The use of non-probability samples is sometimes carried out with the (usually implied) justification that estimates derived from the sample may be linked to some hypothetical universe of elements rather than to a real population. This justification may lead to $\begingroup$ Thank you so much for answering my question I just want to recap here so the advantages for a population is that all your data would be right there. As long as you have the time and money. And the disadvantage would be costly and time consuming. Advantages of a sample is it is easier and more possible to collect the data by using a subset rather than the whole population and it

The basic theory and methods of probability sampling from finite populations were largely developed during the first half of the twentieth century, motivated by the desire to use samples rather than censuses to characterize human, business, and agricultural populations. One of the most common types of nonprobability sample is called a convenience sample – not because such samples are necessarily easy to recruit, but because the researcher uses whatever individuals are available rather than selecting from the entire population.

I happen to have the entire population rather than a sample. I’m basically interested in the relationship between case outcomes and certain features (e.g., time, the appearance of certain words or phrases in the opinion, The probability model of outcomes approach is better developed. One of the most common types of nonprobability sample is called a convenience sample – not because such samples are necessarily easy to recruit, but because the researcher uses whatever individuals are available rather than selecting from the entire population.

Rather you may want to use a sample of oranges and count the number of black spots in that sample. An important thing to keep in mind is that, what is a population and what is a sample, are very context driven questions. Something, which is a sample, in one situation, maybe a population in some other situation. Why Sample? Sampling is done in a wide variety of research settings. Listed below are a few of the benefits of sampling: Reduced cost: It is obviously less costly to obtain data for a selected subset of a population, rather than the entire population.

Systematic sampling is the likelihood of achieving a targeted outcome rather than letting the random data method in which a random sample from a larger population is A Resampling Approach for Under-estimating a Finite Population Total from a Censored Sample Norbert Gaffke* and Andreas Zo¨llner Faculty of Mathematics, University of Magdeburg, Magdeburg, Germany ABSTRACT sample is censorized rather than random. Despite that, a reliable

Statistical Approach to Determining Sample Size Marketing Research Assignment and Online Homework Help Several qualitative factors should also be taken into consideration when determining the sample size, The statistically determined sample size is the net o. In some cases. precision is specified in relative rather than absolute terms. Systematic sampling is the likelihood of achieving a targeted outcome rather than letting the random data method in which a random sample from a larger population is