AP Statistics flashcards

What's in it

Every deck follows the course outline, with tags you can study or suspend topic by topic. Open a deck to study its free sample right here.

Study guide

Topics covered

The decks follow the order of the course outline. Numbers are cards per topic.

• Exploring One-Variable Data and Collecting Data 40
  • Variables and Descriptions of Quantitative Distributions 4
  • Summary Statistics and Comparisons of Distributions 7
  • Data Collection and Random Sampling 6
  • Potential Problems with Sampling 3
  • Experimental Design 8
• Probability Random Variables and Probability Distributions 40
  • Summary Statistics for Two Categorical Variables 3
  • Probability Conditional Probability and Independent Events 7
  • Random Variables and the Binomial Distribution 11
  • Normal Distribution and Sampling Distributions 6
• Inference for Categorical Data Proportions 74
  • Estimators and Sampling Distributions for Sample Proportions 6
  • Sampling Distributions for the Difference Between Sample Proportions 1
  • Constructing a Confidence Interval for a Population Proportion 7
  • Justifying a Claim Based on a Confidence Interval for a Population Proportion 6
  • Setting Up a Test for a Population Proportion and p-Values 4
  • Carrying Out a Test for a Population Proportion 6
  • Potential Errors When Performing Tests 8
  • Intervals and Tests for the Difference Between Two Population Proportions 5
  • Chi-Square Tests for Homogeneity or Independence 12
• Inference for Quantitative Data Means 25
  • Sampling Distributions for Sample Means 4
  • Constructing a Confidence Interval for a Population Mean or Population Mean Difference 7
  • Setting Up and Carrying Out a Test for a Population Mean or Population Mean Difference 4
  • Intervals and Tests for the Difference Between Two Population Means 3
• Regression Analysis 35
  • Graphical Representations and Correlation 4
  • Linear Regression Models and Residuals 7
  • Least-Squares Regression 15

A study plan

• 8 new cards a day covers everything in a month, leaving the last weeks for review.
• 5 new cards a day covers everything in two months, leaving the last weeks for review.

Willys schedules reviews for you (FSRS spaced repetition), so the daily number above is only for new cards; reviews of what you have learned come back on their own. Study a topic's cards right after you meet it in class, suspend topics you have not reached yet, and use the app's quiz mode in the final two weeks.

How to get these decks

1. Install Willys on your iPhone, iPad or Mac — App Store. 14-day free trial, then $14.99 a year.
2. In Willys, tap Exam Library at the top of your Decks (or Browse Exam Library… under the + button), find the exam on its shelf or by search, tick it and tap Add.
3. Study. The exam comes in as its own collapsible folder, every card scheduled by FSRS spaced repetition. Nothing you already have is changed.

About these cards

Review status: Second-reader reviewed, with corrections applied.

Checked against:

• Topic outline follows the College Board AP Statistics Course and Exam Description effective Fall 2026 (first exam May 2027); cards on topics that course removed or does not name are kept as background and say so. The AP name is used nominatively and no course or exam text is reproduced.
• OpenStax Introductory Statistics 2e, consulted as a reference; no text copied.
• Normal probability plots also checked against the NIST/SEMATECH e-Handbook of Statistical Methods; reference only, no text copied.
• Topic outline follows the College Board AP Statistics Course and Exam Description effective Fall 2026 (first exam May 2027); cards on topics that course removed are kept as background and say so. The AP name is used nominatively and no course or exam text is reproduced.
• Topic outline follows the College Board AP Statistics Course and Exam Description effective Fall 2026 (first exam May 2027), each question tagged to its unit; questions on topics that course removed or does not name are kept as background and say so. The AP name is used nominatively and no course or exam text is reproduced.
• Every numerical answer was recomputed by script.

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