AP Statistics Vocabulary
In short: AP Statistics vocabulary: 27 terms on sampling, experimental design, distributions, regression, and inference, each defined in plain language with a short example to help you write precise answers on the exam.
This AP statistics vocabulary page defines the terms the course expects you to use accurately: parameter, statistic, bias, confounding variable, sampling distribution, residual, p-value, confidence interval, Type I error. Each entry has a clear definition and a brief example drawn from a survey, an experiment, or a data set.
On the AP exam, a correct idea written with the wrong word can lose credit, so precise language counts. Print the pages and read them the night before a review: cover the definition, say it aloud, then check. Keep the list beside a worksheet to confirm whether a problem describes a population or a sample.
27 words on this page, each with a definition, a figure, a solved example and two quick questions.
AP Statistics Vocabulary: the full list
Statistics
- Categorical and Quantitative Variables
- Central Limit Theorem
- Chi-Square Test
- Coefficient of Determination (r²)
- Confidence Interval
- Confounding Variable
- Degrees of Freedom
- Experiment vs. Observational Study
- Five-Number Summary
- Hypothesis Testing
- Least-Squares Regression Line
- Null and Alternative Hypotheses
- P-Value
- Percentile
- Sampling Bias
- Sampling Distribution
- Significance Level (Alpha)
- Simple Random Sample
- Skewed Distribution
- Standard Error
- Stratified Random Sampling
- t-Distribution
- t-Test
- Type I and Type II Errors