This page offers a variety of study tools, including flashcards, quizzes, and a glossary, to help you master the key concepts of AP Stats Unit 3. Explore the resources to reinforce your understanding and improve your exam performance.
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Important concepts to remember
A sampling method where each individual in the population has an equal chance of being selected.
A method that divides the population into subgroups (strata) based on a characteristic and then samples from each subgroup.
A sampling method that divides the population into clusters, then selects random clusters and studies all individuals within them.
A systematic error that leads to inaccurate or unfair results in a study.
A type of study where the researcher observes subjects without manipulating variables.
A study where the researcher manipulates one or more variables to observe their effects.
The process of assigning individuals or treatments randomly to groups to avoid bias.
An external variable that influences both the independent and dependent variables, distorting their relationship.
A group in an experiment that does not receive the treatment, used for comparison.
A phenomenon where participants experience changes due to their expectations rather than the treatment itself.
A list of individuals or elements from which a sample is drawn.
Bias introduced when certain individuals do not respond to a survey or experiment, and their lack of response is related to the variable being measured.
A small-scale study conducted to test the feasibility of the research design before the full study is launched.
A study that collects data from every individual in the population.
Bias introduced when participants provide inaccurate or untruthful responses, often due to question phrasing or survey design.
