# Shared Flashcard Set

## Details

AP Statistics Vocabulary
AP Statistics vocabulary from textbook.
18
Mathematics
12th Grade
09/19/2011

## Cards Return to Set Details

Term
 Observational Study
Definition
 We observe individuals and measure variables of interest but do not attempt to influence the responses.
Term
 Experiment
Definition
 We deliberately impose some treatment on individuals in order to observe their responses.
Term
 Population
Definition
 The entire group of individuals that we want information about.
Term
 Sample
Definition
 The part of the population that we actually examine in order to gather information.
Term
 Sampling
Definition
 Studying a part in order to gain information about the whole.
Term
 Census
Definition
 Attempts to contact every individual in the entire population.
Term
 Voluntary Response Sample
Definition
 Consists of people who choose themselves by responding to a general appeal; tend to be biased because people with strong opinions, especially negative opinions, are most likely to respond.
Term
 Convenience Sampling
Definition
 Choosing individuals who are easiest to reach.
Term
 Bias
Definition
 A sampling method that systematically favors certain outcomes.
Term
 Simple Random Sample (SRS)
Definition
 Size n consists of n individuals from the population chosen in such a way that every set of n individuals has an equal chance to be the sample actually selected.
Term
 Random Digits
Definition
 A long string of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 with each entry in the table equally likely to be any of the 10 digits and the entries are independent of each other.
Term
 Probability Sample
Definition
 The general framework for a method that uses chance to choose a sample.
Term
 Probability Sample
Definition
 A sample chosen by chance; we must know what samples are possible and what chance, or probability, each possible sample has.
Term
 Stratified Random Sample
Definition
 The population is divided into groups of individuals, called strata, that are similar in some way that is important to the response.
Term
 Cluster Sampling
Definition
 Divides the population into groups, or clusters. Some of these clusters are randomly selected. Then all individuals in the chosen cluster are selected to be in the sample.
Term
 Undercoverage
Definition
 Occurs when some groups in the population are left out of the process of choosing the sample.
Term
 Nonresponse
Definition
 Occurs when an individual chosen for the sample can't be contact or does not cooperate.
Term
 Response Bias
Definition
 The behavior of the respondent or of the interviewer that can bias an answer.
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