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Free AP Statistics Study Guide

AP Statistics · All 5 Units

Master the newly redesigned AP Statistics course, from exploring one-variable data through regression analysis. Flashcards, cheat sheets, essential terms, practice questions, and visual reviews for all 5 units, all completely free.

5 units covered
40 MCQ + 6 FRQ exam
GAISE-aligned
College Board aligned
100% free

Choose your unit

Each unit has 6 study resources: flashcards, cheat sheet, essential terms, practice questions, visual review, and FRQ practice.

Unit 1
Describing Data
Exploring One-Variable Data & Collecting Data
Categorical and quantitative variables, graphs, summary statistics, describing and comparing distributions, sampling, and experimental design.
20–30% of exam
Start Unit 1 →
Unit 2
Chance & Models
Probability, Random Variables & Probability Distributions
The rules of probability, simulation, random variables, and the binomial and geometric distributions.
15–25% of exam
Start Unit 2 →
Unit 3
Proportions
Inference for Categorical Data: Proportions
Sampling distributions, confidence intervals, and significance tests for one and two population proportions.
15–25% of exam
Start Unit 3 →
Unit 4
Means
Inference for Quantitative Data: Means
The t-distribution, confidence intervals, and significance tests for one mean, paired data, and two means.
10–20% of exam
Start Unit 4 →
Unit 5
Relationships
Regression Analysis
Scatterplots, correlation, least-squares regression, residuals, and inference for the slope of a regression line.
10–20% of exam
Start Unit 5 →

About AP Statistics

AP Statistics is a college-level introductory statistics course built around the four-step statistical investigative process: formulate questions, collect data, analyze data, and interpret results. The redesigned course is aligned to the American Statistical Association's GAISE II guidelines and organized into five units that move from describing data to drawing conclusions from it.

You'll start by exploring one-variable data and collecting data, then study probability and random variables, and finally learn statistical inference: confidence intervals and significance tests for proportions and means, before closing with regression analysis. Throughout, the emphasis is on reasoning with data and communicating conclusions in context.

Every page on this site is aligned to the College Board's official AP Statistics Course and Exam Description and completely free. Use what works for your study style: flashcards for active recall, the cheat sheet for a one-page overview, or practice questions to test yourself before the exam.

What's included in each unit

Every unit has the same 6 study resources, designed for different learning styles.

Flashcards
Interactive cards per unit
Cheat Sheet
One-page visual summary
Essentials
Key terms and core concepts
Visual Review
Slide-by-slide walkthrough
Practice MCQ
Exam-style questions
FRQ Practice
Free-response practice

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