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Marlow Works

AP Course

AP Statistics

AP Statistics is a course in careful claims. You learn how to describe data, collect it without stacking the deck, use probability as a language for uncertainty, and run inference for proportions, means, and linear relationships. These notes are original Marlow Works starters. Check the official course page for the current framework.

5 units10 lessons27 terms

According to College Board, AP Statistics uses a revised 2026–27 framework with five units. Confirm the current unit weights on the official course page. Official source. Last verified 2026-10-01.

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Skills to practice

  • Formulate a statistical question
  • Collect data with a plan
  • Analyze distributions and models
  • Interpret results in context

Units

Current unit structure with original lessons. Weights come from the official course page and should be re-checked there.

Unit 1 of 5 · 20–30%

2 lessons

Exploring One-Variable Data and Collecting Data

Describe a single variable, then design a study that can actually answer the question.

  • Categorical and quantitative variables
  • Shape, center, and spread
  • Standard deviation and z-scores
  • Sampling methods and bias
  • Observational studies and experiments
Open unit 1

Unit 2 of 5 · 15–25%

2 lessons

Probability, Random Variables, and Probability Distributions

Use chance models to say how often outcomes should appear in the long run.

  • Addition and multiplication rules
  • Conditional probability
  • Discrete random variables
  • Expected value and variance
  • Binomial and geometric settings
Open unit 2

Unit 3 of 5 · 15–25%

2 lessons

Inference for Categorical Data: Proportions

Use sample proportions to estimate or test a population proportion.

  • Sampling distributions for a proportion
  • Confidence intervals for one proportion
  • Significance tests for one proportion
  • Comparing two proportions
  • Type I and Type II errors
Open unit 3

Unit 4 of 5 · 10–20%

2 lessons

Inference for Quantitative Data: Means

Estimate and test population means when the data are measurements.

  • Sampling distributions for a mean
  • t-intervals for one mean
  • t-tests for one mean
  • Comparing two means
  • Paired data versus two groups
Open unit 4

Unit 5 of 5 · 10–20%

2 lessons

Regression Analysis

Describe, fit, and question a linear relationship between two quantitative variables.

  • Scatterplots and association
  • Correlation
  • Least-squares regression
  • Interpreting slope and intercept
  • Residuals and residual plots
Open unit 5

Vocabulary

Search the full glossary

Practice

Original Marlow Works questions for this course. They are not College Board items.

1 of 3Exploring One-Variable Data and Collecting Data · easy · multiple choice

A reporter stands at one grocery-store exit and asks shoppers whether they support a new park tax. Why is this a poor way to estimate citywide support?

Original Marlow Works item — not a College Board question.

Take your time—this is practice, not a test.

Study tools

Mixed practiceFlashcardsGlossaryResource library

Related resources

External links with reuse status. Marlow Works is independent and does not copy restricted exam or textbook material.

  • Official / link only

    AP Statistics course page

    Official revised 2026–27 five-unit framework.

    College Board · All rights reserved · accessed 2026-10-01

    Open source

  • CC BY — attribution required

    Collaborative Statistics

    Open statistics text for distributions, probability, and inference.

    Open Textbook Library listing · CC BY · accessed 2026-10-01

    Open source

Official curriculum

Use these College Board pages as curriculum references. Marlow Works is independent and does not copy official sample questions or copyrighted exam text.