Unit 3 Vocab - Prob & Stat

Simple Random Sampling

Each member of pop. is numbered, use RNG to choose sample

Systematic Sampling

Number pop., RNG determines start

Stratified Random Sampling

Pop. is broken into meaningful subgroups called strata, doesn’t mirror the pop. (one specific criterion)

Cluster sampling

Pop. is divided into natural subgroups called clusters, mirrors pop., sample the entire cluster chosen

Convenience Sampling

Choosing individuals of pop. who are easy to reach

Voluntary Response Sampling

Asking members of pop. if they would like to respond or not

Undercoverage Bias

When your sample doesn’t reflect the pop. as a whole

Voluntary Response Bias

When your data are either overwhelmingly positive or negative, or both, but you don’t get “middle of the road” opinions

Non-Response Bias

When people ignore or refuse to respond to a survey resulting in too few responders or undercoverage of pop.

Response Bias

When surveys involve sensitive topics leading to responders lack of honesty in responses that causes inaccurate data