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Sampling Techniques: Random Sampling

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Questions and Answers

What is the main difference between systematic random sampling and stratified random sampling?

Systematic random sampling involves choosing a random starting point, while stratified random sampling groups the population based on categories. (correct)
Systematic random sampling eliminates bias, while stratified random sampling increases the likelihood of bias.
Systematic random sampling focuses on selecting elements from each stratum, while stratified random sampling involves lottery selection.
Systematic random sampling involves dividing the population into groups, while stratified random sampling considers every kth element.

If a population of 100 students is to be sampled using systematic random sampling with a sample size of 20, what would be the value of q in this scenario?

20
4
5 (correct)
10

In systematic random sampling, how can the starting point be determined?

By choosing any arbitrary number as the starting point
By selecting the smallest number in the population
Using a lottery method on all population numbers
By dividing the total number of population members by the desired sample size (correct)

What is a key advantage of stratified random sampling over systematic random sampling?

Stratified random sampling ensures each stratum is represented in the sample (C) Signup and view all the answers

If a population of 80 individuals is divided into 4 strata for stratified random sampling, how many individuals would be in each stratum if all strata are required to be equally represented in the sample?

24 (A) Signup and view all the answers

Why might stratified random sampling be preferred over systematic random sampling?

It ensures equal representation of all population groups (A) Signup and view all the answers

What is random sampling?

A technique used to choose sample members where everyone in the population has equal chances of being included (D) Signup and view all the answers

What is the lottery method in random sampling?

A technique where researchers randomly select sample members using a draw (A) Signup and view all the answers

Why might systematic random sampling be preferred over simple random sampling?

It requires less effort and time (B) Signup and view all the answers

How does systematic random sampling work?

Selecting every 5th individual from the population list (C) Signup and view all the answers

What is stratified random sampling?

A technique used to divide the population into subgroups before sampling from each subgroup (A) Signup and view all the answers

What is a key advantage of using stratified random sampling over simple random sampling?

It allows for representation from different subgroups in the population (D) Signup and view all the answers

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