AP® Statistics, one idea at a time.
Each topic taught from scratch for the 2027 exam, then practice that checks your numbers, your setup and your conclusions in context.
Starts with your first answer. Every question, card and lesson earns XP toward one level that counts across every LevlPrep course, and a day of study keeps a shared streak going.
Introducing Statistics: What Can We Learn from Data?
Unit 1 · Exploring One-Variable Data and Collecting Data. Unit 1 lessons and every notes page are free.
Start the first lessonMissed questions come back
Anything you miss returns when you are about to forget it, not on a fixed date.
Open review →A little every day
Questions, cards and tool steps count toward a daily goal and a streak shared across every LevlPrep subject. 15 practice questions a day are free.
Practice now →The path through the course
The units in framework order, then the math you need: fractions and percents, formulas and square roots, inequalities in words, factorials and combinations, and lines, each placed just before the topic that first needs it. Tap one to open it.
- UnitsUnit 1: Exploring One-Variable Data and Collecting DataStart here · 13 topics · 20–30% of exam
- Unit 2: Probability, Random Variables, and Probability Distributions12 topics · 15–25% of exam
- Unit 3: Inference for Categorical Data: Proportions15 topics · 15–25% of exam
- Unit 4: Inference for Quantitative Data: Means10 topics · 10–20% of exam
- Unit 5: Regression Analysis5 topics · 10–20% of exam
- Math you needMath you need5 topics
What the course covers
5 units and 55 topics in the order of the course framework (the revised course, first examined in May 2027), plus 5 math topics placed where they are first needed. Each topic has an interactive lesson, a free notes page and exam-style practice, and each unit a printable unit sheet.
939 practice questions, many in stimulus sets that share one data set, plot or table, as on the real exam. Every option has its own explanation; a number from a table and the same number from a calculator are both right. Practice checks what the exam checks: data and plots to read, the setup shown as the exam asks, and conclusions written in context, with the math you need placed just before it is used.
All 60 topics are built, each with its lesson, notes and questions.
How to use it
- Read the lesson. It checks what you need first, then walks the cause and effect one step at a time, with a picture for every process.
- Answer as you go. Anything you miss goes into your review queue and comes back when you are about to forget it.
- Train the hard parts. Sampling distributions, intervals, p-values, chi-square and regression, each checked step by step.
- Check your mastery. Your dashboard shows it by unit, topic and skill, and every miss links to its lesson.
Ten trainers for what the exam marks hardest.
Take a thousand samples and watch a sampling distribution build, drag a point and watch the mean and the regression line move, capture a parameter with a hundred intervals, shade a p-value, then answer the questions about what you saw. The data explorer, probability trees and sampling distributions trainers are free.
Try a step.
One real question from the bank. Pick an answer to see why it is right or wrong.
- Read the situation
- Pick the answer you would bet on
- See the cause and effect behind it
A talk show asks viewers to text in their opinion of a new law; 50,000 viewers respond and 85% oppose the law. What is the best criticism?
Show the answer
Viewers chose to respond, so strong views are overrepresented A voluntary response sample is biased toward people with strong views. A huge sample does not fix it.
Practice and study
- PracticeDrill a unit, a topic or a skill, with the probability and regression sets.
- ReviewMissed questions come back when you are about to forget them.
- ExamsUnit tests and full timed practice exams in the May 2027 format.
- Free-response practiceThe four free-response question types, with 10-point rubrics and sample answers.
- Say it in contextConclusions and interpretations in context, checked against a rubric.
- Cram kit3-week and 2-week plans to exam day, and timed mixed sets.
- FlashcardsSpaced-repetition cards from the glossary.
- ToolsTrainers and simulators, then the questions about what you saw.
- DashboardMastery by unit, topic and skill.
- GlossaryEvery term, with a plain definition and where it is taught.
- The reference sheet, explainedEvery formula on the sheet the exam gives you, what it means and when to use it, how to read the tables, and what is not on it.
- Free unit practice testsA free sample test for every unit, with every option explained.