Sampling Methods

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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?

Cluster sampling involves selecting entire groups, while stratified sampling involves selecting individual members Signup and view all the answers

What is the advantage of multistage sampling?

It reduces the cost and time required for data collection Signup and view all the answers

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

It provides more accurate estimates of the population's characteristics Signup and view all the answers

What is the primary advantage of random sampling?

It is simple to carry out Signup and view all the answers

What is a limitation of random sampling?

It often does not provide the most precise estimates for the least money Signup and view all the answers

When is random sampling particularly appropriate?

When a good sampling frame exists and the population is geographically concentrated Signup and view all the answers

What is another name for systematic sampling?

Interval sampling Signup and view all the answers

What is a characteristic of systematic sampling?

There is a gap, or interval between each selected unit in the sample Signup and view all the answers

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

Number the units from 1 to N (N is the total population size) Signup and view all the answers

What is the primary goal of stratified sampling?

To ensure each subgroup of the population is represented in the sample Signup and view all the answers

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

It produces more precise estimates of population parameters Signup and view all the answers

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

Sample size of each stratum is proportionate to the population size of the stratum Signup and view all the answers

In cluster sampling, what is the unit of analysis?

Individual units Signup and view all the answers

What is the primary advantage of cluster sampling?

It reduces the cost of data collection Signup and view all the answers

What is the main disadvantage of stratified sampling?

Analysis can be complicated Signup and view all the answers

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

To ensure each subgroup of the population is represented Signup and view all the answers

What is an example of cluster sampling?

Selecting a sample of classes from a school Signup and view all the answers

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

(sample size/ population size) x stratum size Signup and view all the answers

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