Is AP Statistics practice on Mistake Master free?

Yes. Everything is free and no account is required. Progress saves in the browser using local storage.

Where should I start with AP Statistics practice?

Start with Unit 1, Exploring One-Variable Data and Collecting Data. It carries 20 to 30 percent of the multiple-choice section and its ideas run under everything that follows.

AP Statistics Practice

Q: What AP Statistics practice is available right now?

Unit 1 lessons are shipping first. Topic diagnostics and targeted drills, built on the course's 65 misconception codes, are in production and arrive after the Unit 1 lessons.

Misconception-targeted AP Statistics practice for the redesigned course: 5 units, 55 topics, and a fixed taxonomy of 65 misconception codes. Lessons are shipping first, starting with Unit 1; topic diagnostics and targeted drills follow. No account needed, and progress saves locally in your browser.

Mode 01 · Learn

Topic lessons

Scenario-based lessons written against the course's misconception codes, each closing with a skill check where every wrong choice explains the specific error that produces it. Unit 1 is shipping first.

Built for the redesigned 2026 framework
Every wrong choice maps to a coded error
Unit 1: one-variable data and collecting data

Start with Unit 1

Mode 02 · Diagnose

Topic diagnostic

Short topic-level assessments where a wrong answer identifies a specific reasoning error rather than just a missed point, then routes you to the drills that address what actually fired.

Every distractor coded to a misconception
Sends you to targeted drills next
Arrives after the Unit 1 lessons

In production

Mode 03 · Drill

Targeted drills

Once a diagnostic flags a misconception, the drill attacks that one error from multiple angles with feedback after every question. Not volume: repetition aimed at the thing that broke.

One misconception at a time
Feedback after every question
Reached from your diagnostic result

In production

The teaching layer underneath

Practice only helps if something changes between attempts. The redesigned course maps to a fixed taxonomy of 65 misconception codes across the 5 units, and every lesson is written against those codes directly rather than against a generic topic outline.

Lessons walk the concept in a real data context and close with a skill check, where each wrong choice explains the specific error that produces it. In statistics the error is usually a sentence, not a calculation: a conclusion stated without context, a p-value read as the probability the null is true, a confidence level attached to a single interval. The lessons drill the sentences.

Practice by unit

Five units, redesigned AP Statistics framework

Unit 1Exploring One-Variable Data and Collecting DataOpen ›
Unit 2Probability, Random Variables, and Probability DistributionsIn production
Unit 3Inference for Categorical Data: ProportionsIn production
Unit 4Inference for Quantitative Data: MeansIn production
Unit 5Regression AnalysisIn production

Why misconception-targeted practice works

Most AP Statistics questions are not hard because the computation is hard. They are built to catch a specific wrong idea. A p-value is not the probability the null hypothesis is true. A 95 percent confidence level is not a 95 percent chance the parameter is in your one interval. Correlation in an observational study is not causation. The standard deviation of a sampling distribution is not the standard deviation of the sample. If you do not hold the misconception, the question is routine. If you do, more practice with it intact just rehearses it.

That is why this course is built around diagnose, then drill rather than around problem count. Working two hundred problems while a misconception is still in place rebuilds it two hundred times. Working a handful of problems aimed directly at that misconception, with an explanation after each, is what actually replaces it.

Common questions

FAQ

Is this free?

Yes. Everything here is free, and no account is required. Your progress saves in your browser using local storage.

Does this cover the redesigned course?

Yes, and only the redesigned course. College Board redesigned AP Statistics starting with the 2026-27 school year: 5 units, 55 topics, first exam May 2027. Most older prep materials still follow the retired 9-unit course; everything here is built against the new framework.

What is available right now?

Unit 1 lessons are shipping first: exploring one-variable data and collecting data, the heaviest unit on the exam. Topic diagnostics and targeted drills, built on the course's 65 misconception codes, are in production and arrive after the Unit 1 lessons.

Where should I start?

Start with Unit 1. It opens the course, carries 20 to 30 percent of the multiple-choice section, and its ideas about distributions, variability, and study design run under everything that follows.

Is this aligned to the College Board framework?

Yes. Units, topics, and exam weightings follow the redesigned AP Statistics Course and Exam Description, and every lesson is written against an internal misconception code drawn from a fixed taxonomy for the course.

How long does a session take?

A lesson with its skill check runs about 15 to 20 minutes. Diagnostics and drills will run shorter: roughly 10 to 15 minutes for a diagnostic and 5 to 10 for a single drill.