Sampling Methods and Bias Statistics Flashcards

Question 1

What is a population in statistics?

Accepted Answer

The entire group of individuals or items of interest that you want information about.

Question 2

What is the difference between stratified sampling and cluster sampling?

Accepted Answer

Stratified: split into homogeneous strata and sample some from every stratum. Cluster: split into clusters (mini-populations), randomly select some clusters, then sample everyone (or many) within chosen clusters.

Question 3

What are sampling bias and voluntary response bias?

Accepted Answer

Sampling bias occurs when the selection method systematically favors certain outcomes (the sample is not representative). Voluntary response bias is a type where people self-select into the sample, often overrepresenting strong opinions.

Sampling Methods and Bias Statistics Flashcards

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