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AP Stats Vocab part1

Population a statistical study is the entire group of individuals we want information
Census collects data from every individual in the Population about.
Sample a subset of individuals in the population from which we actually collect data
Sample survey a study that collects data from a sample that is chosen to represent a specific population.
Convenience sample Choosing individuals from the population who are easy to reach results
Bias statistical study that is likely to underestimate or likely to overstimulate the value you want to know
Voluntary response sampling allows people to choose to be in the sample by responding to a general invitation.
Random sampling involves using a chance process to determine which members of a population are included in the sample.
Simple random sample of size n is chosen in such a way that every group of n individuals in the population has an equal chance to be selected as the sample.
Strata are groups of individuals in a population who share characteristics thought to be associated with the variables being measured in a study.
Stratified random sampling selects a sample by choosing an SRS from each stratum and combining the SRSs into one overall sample.
Cluster a group of individuals in the population that are located near each other.
Cluster sampling selects a sample by randomly choosing clusters and including each member of the selected clusters in the sample.
Systematic random sampling selects a sample from an ordered arrangement of the population by randomly selecting one of the first k individuals and choosing every kth individual thereafter.
Undercoverage occurs when some members of the population are less likely to be chosen or cannot be chosen in a sample.
Nonresponse occurs when an individual chosen for the sample can’t be contacted or refuses to participate.
Response bias occurs when there is a systematic pattern of inaccurate answers to a survey question.
Created by: omggirl225
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