Sampling Methods

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Questions and Answers

What is the primary reason to use sampling methods in research?

  • To reduce the cost and time required for data collection (correct)
  • To increase the accuracy of the results
  • To increase the sample size
  • To ensure that every member of the population is included in the study

What is the characteristic of probability sampling?

  • Each person in the population has an unknown chance of being included in the sample
  • Only certain groups in the population are selected for the sample
  • Each person in the population has an equal, known, nonzero chance of being included in the sample (correct)
  • The sample is selected based on the researcher's convenience

What is an advantage of stratified sampling?

  • It reduces the cost and time required for data collection
  • It is a type of non-probability sampling
  • It provides more accurate estimates of the population's characteristics (correct)
  • It allows for the selection of a sample based on the researcher's convenience

What is the main difference between cluster sampling and stratified sampling?

<p>Cluster sampling involves selecting entire groups, while stratified sampling involves selecting individual members (B)</p> Signup and view all the answers

What is the advantage of multistage sampling?

<p>It reduces the cost and time required for data collection (A)</p> Signup and view all the answers

What is the primary advantage of probability sampling over non-probability sampling?

<p>It provides more accurate estimates of the population's characteristics (B)</p> Signup and view all the answers

What is the primary advantage of random sampling?

<p>It is simple to carry out (D)</p> Signup and view all the answers

What is a limitation of random sampling?

<p>It often does not provide the most precise estimates for the least money (C)</p> Signup and view all the answers

When is random sampling particularly appropriate?

<p>When a good sampling frame exists and the population is geographically concentrated (D)</p> Signup and view all the answers

What is another name for systematic sampling?

<p>Interval sampling (D)</p> Signup and view all the answers

What is a characteristic of systematic sampling?

<p>There is a gap, or interval between each selected unit in the sample (D)</p> Signup and view all the answers

What is the first step in the procedure of systematic sampling?

<p>Number the units from 1 to N (N is the total population size) (D)</p> Signup and view all the answers

What is the primary goal of stratified sampling?

<p>To ensure each subgroup of the population is represented in the sample (D)</p> Signup and view all the answers

What is the advantage of systematic sampling over simple random sampling?

<p>It produces more precise estimates of population parameters (A)</p> Signup and view all the answers

What is the main difference between proportionate and disproportionate stratified random sampling?

<p>Sample size of each stratum is proportionate to the population size of the stratum (B)</p> Signup and view all the answers

In cluster sampling, what is the unit of analysis?

<p>Individual units (B)</p> Signup and view all the answers

What is the primary advantage of cluster sampling?

<p>It reduces the cost of data collection (C)</p> Signup and view all the answers

What is the main disadvantage of stratified sampling?

<p>Analysis can be complicated (A)</p> Signup and view all the answers

What is the purpose of dividing the population into strata in stratified sampling?

<p>To ensure each subgroup of the population is represented (A)</p> Signup and view all the answers

What is an example of cluster sampling?

<p>Selecting a sample of classes from a school (D)</p> Signup and view all the answers

What is the formula to determine sample size in proportionate stratified random sampling?

<p>(sample size/ population size) x stratum size (D)</p> Signup and view all the answers

What is the primary advantage of systematic sampling over simple random sampling?

<p>It produces more precise estimates of population parameters (D)</p> Signup and view all the answers

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