AP Statistics-Sampling Review Test Questions 2024.

AP Statistics-Sampling Review Test Questions 2024. SRS - correct answer -unbiased, each unit has the same chance of being chosen -independent-selection of one unit has no influence on the selection of other units -all possible samples of n objects are equally likely Stratified random sample - correct answer -you know something about the population ahead of time -divide the population into homogeneous groups (Strata) -take an SRS from each Strata Cluster Sampling - correct answer -Population is grouped together in clusters -Take an SRS of the clusters -Do a census of the groups randomly selected (all members of each group) Systematic Sampling - correct answer -every nth unit is selected Multistage Sampling - correct answer -using a variety of the above sampling methods all at once Undercoverage - correct answer -fails to get from some part of the population Voluntary Response Bias - correct answer -Choice rather than randomization is used to obtain a sample (ex:strong opinions)