AP StatisticsAP

Exploring data, inference, and probability.

Practice

Timed and untimed modes with explanations.

Flashcards

Flip through key concepts and formulas.

Overview

AP Statistics builds understanding of variability, data collection, probability, and statistical inference.

Why it matters

Teaches data literacy and decision-making under uncertainty used in science, business, and social sciences.

Skills you’ll build

  • Graphical summaries
  • Study design
  • Probability models
  • Inference procedures

Topic Breakdown (Units)

Unit 1: Exploring One-Variable Data

  • Graphing distributions
  • Center & spread

Unit 2: Exploring Two-Variable Data

  • Scatterplots
  • Correlation
  • Least-squares regression

Unit 3: Collecting Data

  • Sampling
  • Experiment design

Unit 4: Probability, Random Variables, and Probability Distributions

  • Rules of probability
  • Discrete/continuous RVs

Unit 5: Sampling Distributions

  • Central Limit Theorem
  • Proportions & means

Unit 6: Inference for Categorical Data: Proportions

  • One/two-sample z procedures

Unit 7: Inference for Quantitative Data: Means

  • t-procedures for one/two samples

Unit 8: Inference for Categorical Data: Chi-Square

  • χ² tests

Unit 9: Inference for Quantitative Data: Slopes

  • Inference for regression slope

Lessons & Notes

Unit 1: Exploring One-Variable Data

Describe distributions with numerical and visual tools.

  • mean/median
  • IQR/SD

Unit 2: Exploring Two-Variable Data

Quantify and model relationships.

  • r
  • residuals

Unit 3: Collecting Data

Plan studies and control sources of bias.

  • randomization
  • blocking

Unit 4: Probability, Random Variables, and Probability Distributions

Model randomness and long-run behavior.

  • Law of Large Numbers
  • expected value

Unit 5: Sampling Distributions

Understand variability of statistics.

  • standard error
  • normal approximations

Unit 6: Inference for Categorical Data: Proportions

Test and estimate population proportions.

  • conditions
  • p̂, z, CI

Unit 7: Inference for Quantitative Data: Means

Test and estimate means.

  • t-distribution
  • pooled vs. unpooled

Unit 8: Inference for Categorical Data: Chi-Square

Goodness-of-fit, homogeneity, and independence.

  • df
  • expected counts

Unit 9: Inference for Quantitative Data: Slopes

Model linear relationships with inference.

  • t test for β₁
  • conditions

Helpful Resources