Multiple choice
42 questions · 1 hour 30 minutes · 50%
← All AP courses
AP Statistics exam prep
Use the revised 2026–27 five-unit framework to formulate questions, collect data, analyze uncertainty, perform inference, and communicate defensible conclusions.
AP5units
AP Statistics exam format
Fully digital · revised 2027 exam. Formats can change, so verify the linked official page before exam day.
Official College Board exam page ↗Free response
4 questions · 1 hour 30 minutes · 50%
AP Statistics unit roadmap
Each unit is a connected part of the course, not an isolated chapter. The focus says what you must know and the weighting says how much exam time it is worth. Use the weighting to order your review, never as permission to skip a prerequisite.
One-Variable Data and Collecting Data
Distributions, sampling, experiments, bias, ethical data collection
- Define the vocabulary you need to explain distributions, sampling, experiments, bias, ethical data collection.
- Draw and label the graph, model, diagram, or evidence that best represents one-variable data and collecting data.
- Solve one direct one-variable data and collecting data question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Conditions before inference
Probability, Random Variables, and Distributions
Simulation, probability rules, discrete and continuous variables
- Define the vocabulary you need to explain simulation, probability rules, discrete and continuous variables.
- Draw and label the graph, model, diagram, or evidence that best represents probability, random variables, and distributions.
- Solve one direct probability, random variables, and distributions question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Parameter versus statistic language
Inference for Categorical Data: Proportions
Sampling distributions, intervals, and tests for proportions
- Define the vocabulary you need to explain sampling distributions, intervals, and tests for proportions.
- Draw and label the graph, model, diagram, or evidence that best represents inference for categorical data: proportions.
- Solve one direct inference for categorical data: proportions question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Random assignment versus random sampling
Inference for Quantitative Data: Means
Intervals and tests for means and paired data
- Define the vocabulary you need to explain intervals and tests for means and paired data.
- Draw and label the graph, model, diagram, or evidence that best represents inference for quantitative data: means.
- Solve one direct inference for quantitative data: means question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Probability and simulation
Regression Analysis
Two-variable data, linear models, inference for slopes
- Define the vocabulary you need to explain two-variable data, linear models, inference for slopes.
- Draw and label the graph, model, diagram, or evidence that best represents regression analysis.
- Solve one direct regression analysis question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Context-rich conclusions
Use a diagnostic to find the first knowledge gap
This short check is not a score prediction. It identifies which part of the course deserves your next focused session.
- Answer without notes.
- Explain your choice before revealing feedback.
- Record every uncertain answer, including lucky guesses.
Question 1 of 3
Scored skills for the AP Statistics exam
Knowing an idea internally is not enough. Practice producing observable evidence under time pressure.
Formulate statistical investigative questions
Choose ethical collection and inference methods
Calculate and represent statistical results
Interpret results in context and justify claims
Highest-value review targets
- Conditions before inference
- Parameter versus statistic language
- Random assignment versus random sampling
- Probability and simulation
- Context-rich conclusions
AP Statistics formulas and reference relationships
A useful sheet records meaning and conditions, not isolated symbols. Rebuild it from a blank page until every line comes back with its conditions attached.
Standard score
\[z=\frac{x-\mu}{\sigma}\]
What it tells you: Expresses a value in population standard-deviation units from the mean.
Use it when: $\sigma>0$ and the context must justify the distribution model used afterward.
Example: $x=85,\mu=70,\sigma=10$ gives $z=1.5$.
One-proportion confidence interval
\[\hat p\pm z^*\sqrt{\frac{\hat p(1-\hat p)}n}\]
What it tells you: Estimates a population proportion with a long-run confidence procedure.
Use it when: Check randomization or representative sampling, independence, and large expected success and failure counts.
Example: With $\hat p=.60,n=400$, the standard error is about $.0245$.
One-sample t statistic
\[t=\frac{\bar x-\mu_0}{s/\sqrt n}\]
What it tells you: Compares a sample mean with a null population mean when population spread is unknown.
Use it when: Observations should be independent and the sampling distribution sufficiently regular.
Example: $\bar x=52,\mu_0=50,s=8,n=16$ gives $t=1$.
Regression line
\[\hat y=b_0+b_1x,\quad e=y-\hat y\]
What it tells you: Predicts a response and defines each vertical residual.
Use it when: A linear model should fit the scatterplot and residuals; extrapolation needs justification.
Example: If $\hat y=4+2x$ and $x=3$, the prediction is $10$.
What the AP Statistics exam hands you, and what you have to recall
| Section or part | What you may use | What that means for your work |
|---|---|---|
| Multiple choice | Graphing calculator with statistics functions | Use it for normalcdf, invNorm, and binomial probabilities instead of the tables when speed matters. |
| Free response | Graphing calculator with statistics functions | The calculator gives the number; the rubric pays for the name of the procedure and the conditions. |
| Provided for the whole exam | Formula sheet and tables | Formulas and the normal, t, and chi-square tables are given. Do not spend study time memorising them - spend it on when each applies. |
Anything the table does not hand you, you have to remember. The AP Statistics study plan puts these rules on a week-by-week schedule.
Your AP Statistics preparation plan
Repeat this loop weekly: retrieve, diagnose, repair, mix, time, and reflect.
01
AP-style practice
Original questions, immediate explanations, and local progress.
Start →02Full course test
A timed mixed-unit test with a complete answer review.
Test →03Study plan and strategy
Eight weeks, plus the timing, calculator, and task-verb decisions.
Plan →04Unit roadmap
Every unit, its weighting, and what mastery looks like.
Review →05Formula review
Key relationships, their conditions, and what the exam provides.
Recall →Questions about the AP Statistics exam
Can I use a graphing calculator on the AP Statistics exam?
Rules change from section to section. Multiple choice: graphing calculator with statistics functions. Free response: graphing calculator with statistics functions. Provided for the whole exam: formula sheet and tables. Practise each section under its own rule.
How long is the AP Statistics exam?
Multiple choice: 1 hour 30 minutes, 42 questions. Free response: 1 hour 30 minutes, 4 questions. Multiple choice — About 2.1 minutes each. Reading the scenario is most of the work; the arithmetic is usually small. Free response — About 22 minutes per question. These are long, multi-part scenarios - read all parts before writing part (a).
Which AP Statistics unit is weighted most heavily?
One-Variable Data and Collecting Data (20–30%) carries the largest published weighting. Use the weighting to order your review, not to skip a prerequisite that a heavier unit depends on.
Is a formula sheet given on the AP Statistics exam?
Yes. The AP Statistics exam gives you the formula sheet and tables. Formulas and the normal, t, and chi-square tables are given. Do not spend study time memorising them - spend it on when each applies.
Use AI responsibly during AP exam preparation
Attempt first. Ask for a hint or critique. Close the explanation and solve again from memory. Never use outside help on a live or prohibited assessment.
Turn the guide into exam-day skill
Start a focused AP Statistics practice set, check each explanation, and use every miss to choose your next review session.
MathGPT.now is independent and is not affiliated with or endorsed by College Board. Exam formats can change.
Verify AP Statistics information on AP Central ↗