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STAT110

Lecture #7 - 9/13

QuestionAnswer
general errors caused by the act of taking a sample *didn't ask everyone* sampling errors
never fully matches population, least bad sample b/c we know how big it is random sampling error
list of individuals from which we draw our sample sampling frame
when some groups in population are left out of the process of choosing the sample undercoverage
errors not related to the act of selecting a sample from the population: nonresponse, response errors, or processing errors; can occur even if everyone is asked non-sampling errors
anything that has more than 2 steps; large population where certian groups & subgroups available multistage sample
pick off population into chunks. select one or more chunk & include everyone in the chunk in the sample. cluster sample
take every "nth" item from the sampling frame. LISTING. systematic sample
divide sampling frame into groups called strata. take SRS in each stratum & combine to make up the random sample (2 steps). eliminates some variability. stratified random sample
sample chosen by chance probability sample
Created by: ConnorLomis
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