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Stats Vocab (1.2)
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Terms in this set (15)
population
includes all individuals of objects of interest
census
occurs when every case in the population is measured
sampling frame
a list of the names of all subjects of objects in the population
sample
where data is collected; a subset of of the population
statistical inference
the process of using data from a sample to gain information about the population
simple random sample
obtained when every sample of a given size equally likely to be the one selected
stratified random sampling
occurs when the population is divided into homogeneous, non-overlapping groups (called strata) and a simple random sample is selected from each group
cluster random sampling
divides the population into many non-overlapping groups (called clusters), randomly selects a subset of clusters, and collects data from every case in the cluster
sampling bias
occurs when the sample does not accurately represent the population of interest
voluntary response sampling
occurs when a researcher asks people to volunteer to be participants instead of randomly selecting possible participants
convenience sampling
happens when a researcher just uses the most convenient group as a sample
bias
occurs when the results from the sample differ from the population
response bias
the tendency for people to not answer questions honestly
non-response bias
occurs when the response rate is very low
undercoverage
occurs when part of the population is not considered for inclusion in the sample
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