AP Statistics Cheatsheets

AP Statistics, unit by unit

What each unit's one-page cheatsheet covers. Open a unit to read the start of its sheet.

1. Unit 1: Exploring One-Variable Data and Collecting Data

   Statistical Study Fundamentals · Center, Position & Variability · Random Sampling & Bias · Variables: Types & Roles · Distribution Shape & Features · Experimental Design & Generalization · Categorical & Quantitative Displays · Z-Scores & Boxplots · Data Collection: Study Types

2. Unit 2: Probability, Random Variables, and Probability Distributions

   Two-Way Tables & Relative Frequencies · Mutually Exclusive & Conditional Probability · Normal Distribution Basics · Probability Foundations · Discrete Random Variables & Distributions · Normal Probabilities & z-Scores · Independence & Union of Events · Binomial Distribution · Sampling Distributions & Central Limit Theorem

3. Unit 3: Inference for Categorical Data: Proportions

   Estimators + Sampling Distributions · One-Proportion z Procedures · Errors + Power · Two-Proportion z Procedures · Full-Credit Inference Workflow · Interpretation Sentence Starters · Interval ↔ Test Connection · Chi-Square Tests · Choose the Procedure · Count Conditions at a Glance

4. Unit 4: Inference for Quantitative Data: Means

   Sampling Distribution of x̄: Parameters & Conditions · t-Distribution Properties · Two-Sample Sampling Distribution · One-Sample t-Interval for μ · One-Sample t-Test for μ & Matched Pairs · Two-Sample CI: Assessing Difference · Interpreting & Using Confidence Intervals · Hypothesis Test Conclusions · Two-Sample t-Interval & Test for μ₁ − μ₂

5. Unit 5: Regression Analysis

   Scatterplot Setup & Description · Solving Regression Questions: Step-by-Step · Common Traps & Interpretation Errors · Correlation Coefficient r · Linear Regression Model · Residuals & Residual Plots · Least-Squares Regression Line (LSRL) · Interpolation vs. Extrapolation · Quick Reference: Formulas & Notation