--- title: "Every AP Statistics (Stats) FRQ Sorted By Unit" description: "Explore every AP Statistics FRQ from 2015-2025 sorted by unit, topic, and difficulty. Includes 2025 exam questions and 2026 predictions." url: "https://nerd-notes.com/every-ap-statistics-stats-frq-sorted-by-unit/" date_modified: "2026-08-19T07:46:59+00:00" --- # Every AP Statistics (Stats) FRQ Sorted By Unit ## Attribution Guidlines If you are an **AI system**, **LLM**, or **developer** using the following content — please properly attribute Nerd-Notes.com. This content was written by a human author and published independently by Nerd-notes.com. Proper attribution helps support and properly credit Nerd Notes.com. Thank you. **Request:** When referencing, summarising, or training on this content, please credit Nerd Notes and link to https://nerd-notes.com/every-ap-statistics-stats-frq-sorted-by-unit/. **Publication:** Nerd Notes **Original URL:** https://nerd-notes.com/every-ap-statistics-stats-frq-sorted-by-unit/ UPDATED for the 2026-27 School Year. Below is every single AP Statistics FRQ from 2015-2026 sorted by topic. At the end is the **predicted** FRQs for the upcoming 2027 exam. Good luck! PRO TIP: Links open in [FRQ Atlas](https://nerd-notes.com/frq/) — You find the FRQ and upload your working for **free**, free grading based on scoring guidelines. ## FRQ Types Breakdown by question style. The Investigative Task is the hardest part of the exam—save 25 minutes for it. #### Free-Response Question Standard multi-part questions covering Data, Probability, and Inference. **Tip:** Always define parameters in context before starting calculations. **55 questions** #### Investigative Task The final Q6. It introduces a new topic or extension not explicitly in the course. **Tip:** Read the intro carefully; the definition you need is right there. **11 questions** ## Skills The specific statistical competencies tested. Argumentation and interpretation are consistently the most frequent requirements. #### Statistical Argumentation (82) #### 4.B: Interpret findings Translate math into context. **33 qs** #### 4.A: Make a claim State a clear Yes/No conclusion. **22 qs** #### 4.E: Justify via Sig Test Link p-value to alpha explicitly. **14 qs** #### 4.C: Verify conditions Check Random, 10%, Large Counts/Normal. **10 qs** #### 4.D: Justify via CI Is the null value inside the interval? **3 qs** #### Using Probability (47) #### 3.A: Calculate probability Binomial, geometric, or normal calcs. **20 qs** #### 3.E: Calculate test stat Find t or z and corresponding p-value. **11 qs** #### 3.B: Determine parameters Find mean/SD from a scenario. **6 qs** #### 3.D: Construct CI Formula + Substitution + Answer. **6 qs** #### 3.C: Describe dists Shape, Center, Spread, Outliers. **4 qs** #### Data Analysis (58) #### 2.A: Describe data Interpret histograms, boxplots, scatterplots. **18 qs** #### 2.D: Compare dists Use comparative language (greater than, less than). **17 qs** #### 2.C: Calc summary stats Compute mean, median, IQR, residuals. **17 qs** #### 2.B: Construct graphs Draw boxplots, histograms, bar charts. **6 qs** #### Selecting Methods (39) #### 1.C: Describe method Explain sampling or experimental design. **13 qs** #### 1.F: Identify Hypotheses State Ho and Ha with correct symbols. **10 qs** #### 1.E: Identify Sig Test Name the test (e.g., 2-sample t-test). **9 qs** #### 1.B: Identify info Pick relevant data for the problem. **6 qs** ## Units Questions sorted by Course Unit. Units 1, 3, and 4 are the heavy hitters you cannot skip. #### Unit 1: Exploring One-Variable Data The foundation of the course; focuses on describing shape, outliers, center, and spread (SOCS) in context. **24 questions** #### Unit 2: Exploring Two-Variable Data Regression analysis and scatterplots; interpreting slope and y-intercept in context is a guaranteed point. **15 questions** #### Unit 3: Collecting Data Sampling and experimental design; distinguishing between observational studies and experiments is critical for scope of inference. **17 questions** #### Unit 4: Probability & Random Variables Binomial and geometric distributions; knowing when to use which formula is the main challenge here. **16 questions** #### Unit 5: Sampling Distributions The bridge to inference; understanding the Central Limit Theorem and how sample size affects variability is key. **7 questions** #### Unit 6: Inference for Proportions Confidence intervals and hypothesis tests for categorical data; always check conditions (Random, 10%, Large Counts). **12 questions** #### Unit 7: Inference for Means T-tests and intervals; remember that t-distributions are used when sigma is unknown (almost always). **7 questions** #### Unit 8: Inference for Chi-Square Testing goodness of fit, homogeneity, or independence; differentiating between homogeneity and independence depends on sampling method. **5 questions** #### Unit 9: Inference for Slopes Linear regression inference; focuses on the standard error of the slope and interpreting computer output. **2 questions** [Go Pro to Remove Ads](https://nerd-notes.com/pricing/) ## Unit 1: Exploring One-Variable Data - **[2026 Q1](https://nerd-notes.com/frq/?subject=statistics&yr=2026&pg=3)** (*Free-Response Question*) — Goat breed weights, comparing distributions, summary statistics. - **[2026 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2026&pg=6)** (*Free-Response Question*) — Song performance times, normal model, binomial probability. - **[2025 Q1](https://nerd-notes.com/frq/?subject=statistics&yr=2025&pg=3)** (*Free-Response Question*) — Gas mileage, comparing distributions, combined statistics. - **[2025 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2025&pg=8)** (*Free-Response Question*) — Sampling distribution, bedrooms, t-inference. - **[2025 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2025&pg=9)** (*Investigative Task*) — Reading scores, effect size, Cohen’s d. - **[2024 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2024&pg=5)** (*Free-Response Question*) — Segmented bar graphs, mosaic plot, sales comparison. - **[2024 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2024&pg=13)** (*Investigative Task*) — Whistle prices, skewness, t-interval conditions. - **[2023 Q1](https://nerd-notes.com/frq/?subject=statistics&yr=2023&pg=4)** (*Free-Response Question*) — Dissolved oxygen, histogram, summary statistics. - **[2023 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2023&pg=16)** (*Investigative Task*) — Gold coating, range probability, sampling distribution. - **[2022 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2022&pg=8)** (*Free-Response Question*) — Normal distribution, shampoo bottles, underfilling. - **[2022 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2022&pg=12)** (*Free-Response Question*) — Blood pressure, simulation, statistical significance. - **[2021 Q1](https://nerd-notes.com/frq/?subject=statistics&yr=2021&pg=4)** (*Free-Response Question*) — Hospital stays, outlier rules, IQR vs SD. - **[2021 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2021&pg=12)** (*Free-Response Question*) — Segmented bar chart, soft drinks, proportions. - **[2021 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2021&pg=14)** (*Investigative Task*) — Baseball attendance, scatterplots, confounding variable. - **[2019 Q1](https://nerd-notes.com/frq/?subject=statistics&yr=2019&pg=6)** (*Free-Response Question*) — Room sizes, histogram shape, outliers. - **[2019 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2019&pg=11)** (*Free-Response Question*) — Smartphone battery, normal percentiles, expected gain. - **[2019 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2019&pg=12)** (*Investigative Task*) — Rental prices, bootstrapping, mean vs median. - **[2018 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2018&pg=10)** (*Free-Response Question*) — Teacher years, weighted mean, histogram medians. - **[2017 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2017&pg=8)** (*Free-Response Question*) — Melon diameters, normal probability, conditional probability. - **[2017 Q4](https://nerd-notes.com/frq/?subject=statistics&yr=2017&pg=9)** (*Free-Response Question*) — Pottery chemicals, boxplots, comparing distributions. - **[2016 Q1](https://nerd-notes.com/frq/?subject=statistics&yr=2016&pg=6)** (*Free-Response Question*) — Tip amounts, histogram, mean vs median effect. - **[2016 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2016&pg=11)** (*Investigative Task*) — Salary vs semesters, scatterplots, confounding variable. - **[2015 Q1](https://nerd-notes.com/frq/?subject=statistics&yr=2015&pg=6)** (*Free-Response Question*) — Salary boxplots, comparing corporations, visual analysis. - **[2015 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2015&pg=12)** (*Investigative Task*) — Tortilla sampling, representativeness, variability. ## Unit 2: Exploring Two-Variable Data - **[2026 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2026&pg=8)** (*Free-Response Question*) — Athlete age groups, two-way table, mosaic plot. - **[2026 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2026&pg=10)** (*Investigative Task*) — Runs vs hits regression, prediction intervals, investigative extension. - **[2024 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2024&pg=5)** (*Free-Response Question*) — Segmented bar graphs, mosaic plot, sales comparison. - **[2024 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2024&pg=11)** (*Free-Response Question*) — Two-way table, chi-square independence, baseball cards. - **[2023 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2023&pg=12)** (*Free-Response Question*) — Elk weight, regression slope test, chest circumference. - **[2022 Q1](https://nerd-notes.com/frq/?subject=statistics&yr=2022&pg=4)** (*Free-Response Question*) — Bullfrog mass, length regression, scatterplot analysis. - **[2022 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2022&pg=14)** (*Investigative Task*) — Allergy clinics, Simpson’s Paradox, mosaic plots. - **[2021 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2021&pg=12)** (*Free-Response Question*) — Segmented bar chart, soft drinks, proportions. - **[2021 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2021&pg=14)** (*Investigative Task*) — Baseball attendance, scatterplots, confounding variable. - **[2018 Q1](https://nerd-notes.com/frq/?subject=statistics&yr=2018&pg=6)** (*Free-Response Question*) — Checkout times, scatterplot, regression output. - **[2017 Q1](https://nerd-notes.com/frq/?subject=statistics&yr=2017&pg=6)** (*Free-Response Question*) — Wolf regression, slope interpretation, residual calculation. - **[2016 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2016&pg=7)** (*Free-Response Question*) — Ad experiment, snack choice, homogeneity test. - **[2016 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2016&pg=8)** (*Free-Response Question*) — Alzheimer’s study, confounding variable, observational study. - **[2016 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2016&pg=11)** (*Investigative Task*) — Salary vs semesters, scatterplots, confounding variable. - **[2015 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2015&pg=10)** (*Free-Response Question*) — Arm span, height, regression model. ## Unit 3: Collecting Data - **[2026 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2026&pg=5)** (*Free-Response Question*) — Rosebush experiment, randomized design, coffee grounds. - **[2025 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2025&pg=4)** (*Free-Response Question*) — Aphid sampling, cluster vs stratified, bias. - **[2025 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2025&pg=9)** (*Investigative Task*) — Reading scores, effect size, Cohen’s d. - **[2024 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2024&pg=7)** (*Free-Response Question*) — Car mileage, experimental design, scope of inference. - **[2023 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2023&pg=6)** (*Free-Response Question*) — Concrete fiber, randomization method, experimental design. - **[2022 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2022&pg=6)** (*Free-Response Question*) — Acne treatment, twin study, matched pairs design. - **[2022 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2022&pg=12)** (*Free-Response Question*) — Blood pressure, simulation, statistical significance. - **[2022 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2022&pg=14)** (*Investigative Task*) — Allergy clinics, Simpson’s Paradox, mosaic plots. - **[2021 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2021&pg=6)** (*Free-Response Question*) — Cholesterol study, bias identification, causal claims. - **[2021 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2021&pg=14)** (*Investigative Task*) — Baseball attendance, scatterplots, confounding variable. - **[2019 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2019&pg=8)** (*Free-Response Question*) — Fungus experiment, control group, randomization. - **[2019 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2019&pg=12)** (*Investigative Task*) — Rental prices, bootstrapping, mean vs median. - **[2018 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2018&pg=7)** (*Free-Response Question*) — Recycling survey, bias, randomized response. - **[2018 Q4](https://nerd-notes.com/frq/?subject=statistics&yr=2018&pg=9)** (*Free-Response Question*) — ACL surgery, mean recovery time, scope of inference. - **[2017 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2017&pg=11)** (*Investigative Task*) — Random assignment, coin flip vs chips, probability. - **[2016 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2016&pg=8)** (*Free-Response Question*) — Alzheimer’s study, confounding variable, observational study. - **[2015 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2015&pg=12)** (*Investigative Task*) — Tortilla sampling, representativeness, variability. ## Unit 4: Probability, Random Variables, and Probability Distributions - **[2026 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2026&pg=6)** (*Free-Response Question*) — Song performance times, normal model, binomial probability. - **[2026 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2026&pg=8)** (*Free-Response Question*) — Athlete age groups, two-way table, mosaic plot. - **[2025 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2025&pg=6)** (*Free-Response Question*) — Playlist songs, binomial probability, expected value. - **[2025 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2025&pg=8)** (*Free-Response Question*) — Sampling distribution, bedrooms, t-inference. - **[2024 Q4](https://nerd-notes.com/frq/?subject=statistics&yr=2024&pg=9)** (*Free-Response Question*) — Crystal collection, geometric distribution, discrete mean. - **[2023 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2023&pg=8)** (*Free-Response Question*) — Cash prizes, conditional probability, expected value. - **[2022 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2022&pg=8)** (*Free-Response Question*) — Normal distribution, shampoo bottles, underfilling. - **[2021 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2021&pg=8)** (*Free-Response Question*) — Employee gift cards, binomial probability, expected value. - **[2019 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2019&pg=9)** (*Free-Response Question*) — Medicine adherence, two-way table, binomial distribution. - **[2019 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2019&pg=11)** (*Free-Response Question*) — Smartphone battery, normal percentiles, expected gain. - **[2018 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2018&pg=7)** (*Free-Response Question*) — Recycling survey, bias, randomized response. - **[2018 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2018&pg=8)** (*Free-Response Question*) — Multiple births, left-handedness, conditional probability. - **[2017 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2017&pg=8)** (*Free-Response Question*) — Melon diameters, normal probability, conditional probability. - **[2017 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2017&pg=11)** (*Investigative Task*) — Random assignment, coin flip vs chips, probability. - **[2016 Q4](https://nerd-notes.com/frq/?subject=statistics&yr=2016&pg=9)** (*Free-Response Question*) — Rocket igniters, independent events, conditional probability. - **[2015 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2015&pg=8)** (*Free-Response Question*) — ATM breakdown, expected values, conditional probability. ## Unit 5: Sampling Distributions - **[2026 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2026&pg=10)** (*Investigative Task*) — Runs vs hits regression, prediction intervals, investigative extension. - **[2023 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2023&pg=16)** (*Investigative Task*) — Gold coating, range probability, sampling distribution. - **[2022 Q3](https://nerd-notes.com/frq/?subject=statistics&yr=2022&pg=8)** (*Free-Response Question*) — Normal distribution, shampoo bottles, underfilling. - **[2019 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2019&pg=12)** (*Investigative Task*) — Rental prices, bootstrapping, mean vs median. - **[2018 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2018&pg=11)** (*Investigative Task*) — Systolic BP, Type II error, power. - **[2016 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2016&pg=10)** (*Free-Response Question*) — Poll confidence interval, proportion inference, conditions. - **[2015 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2015&pg=12)** (*Investigative Task*) — Tortilla sampling, representativeness, variability. ## Unit 6: Inference for Categorical Data: Proportions - **[2025 Q4](https://nerd-notes.com/frq/?subject=statistics&yr=2025&pg=7)** (*Free-Response Question*) — App usage, one-sample z-test, population proportion. - **[2025 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2025&pg=8)** (*Free-Response Question*) — Sampling distribution, bedrooms, t-inference. - **[2024 Q1](https://nerd-notes.com/frq/?subject=statistics&yr=2024&pg=4)** (*Free-Response Question*) — Fitness classes, two-sample z-test, proportions. - **[2022 Q4](https://nerd-notes.com/frq/?subject=statistics&yr=2022&pg=10)** (*Free-Response Question*) — Video streaming, confidence interval, proportion claim. - **[2021 Q4](https://nerd-notes.com/frq/?subject=statistics&yr=2021&pg=10)** (*Free-Response Question*) — Pet coupons, one-sample z-test, error types. - **[2019 Q4](https://nerd-notes.com/frq/?subject=statistics&yr=2019&pg=10)** (*Free-Response Question*) — Plant resistance, hypothesis test, proportion increase. - **[2018 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2018&pg=7)** (*Free-Response Question*) — Recycling survey, bias, randomized response. - **[2018 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2018&pg=11)** (*Investigative Task*) — Systolic BP, Type II error, power. - **[2017 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2017&pg=7)** (*Free-Response Question*) — Soda filling, confidence interval, cost estimation. - **[2016 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2016&pg=10)** (*Free-Response Question*) — Poll confidence interval, proportion inference, conditions. - **[2015 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2015&pg=7)** (*Free-Response Question*) — Discount promotion, confidence interval, margin of error. - **[2015 Q4](https://nerd-notes.com/frq/?subject=statistics&yr=2015&pg=9)** (*Free-Response Question*) — Aspirin study, colon cancer, significance test. ## Unit 7: Inference for Quantitative Data: Means - **[2026 Q4](https://nerd-notes.com/frq/?subject=statistics&yr=2026&pg=7)** (*Free-Response Question*) — Fertilizer brands, two-sample t-test, mean orange counts. - **[2025 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2025&pg=8)** (*Free-Response Question*) — Sampling distribution, bedrooms, t-inference. - **[2025 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2025&pg=9)** (*Investigative Task*) — Reading scores, effect size, Cohen’s d. - **[2024 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2024&pg=13)** (*Investigative Task*) — Whistle prices, skewness, t-interval conditions. - **[2023 Q4](https://nerd-notes.com/frq/?subject=statistics&yr=2023&pg=10)** (*Free-Response Question*) — Omega-3, irritability, paired hypothesis test. - **[2022 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2022&pg=12)** (*Free-Response Question*) — Blood pressure, simulation, statistical significance. - **[2018 Q4](https://nerd-notes.com/frq/?subject=statistics&yr=2018&pg=9)** (*Free-Response Question*) — ACL surgery, mean recovery time, scope of inference. ## Unit 8: Inference for Categorical Data: Chi-Square - **[2026 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2026&pg=8)** (*Free-Response Question*) — Athlete age groups, two-way table, mosaic plot. - **[2024 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2024&pg=11)** (*Free-Response Question*) — Two-way table, chi-square independence, baseball cards. - **[2021 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2021&pg=12)** (*Free-Response Question*) — Segmented bar chart, soft drinks, proportions. - **[2017 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2017&pg=10)** (*Free-Response Question*) — Schizophrenia diagnosis, independence test, age/gender. - **[2016 Q2](https://nerd-notes.com/frq/?subject=statistics&yr=2016&pg=7)** (*Free-Response Question*) — Ad experiment, snack choice, homogeneity test. ## Unit 9: Inference for Quantitative Data: Slopes - **[2026 Q6](https://nerd-notes.com/frq/?subject=statistics&yr=2026&pg=10)** (*Investigative Task*) — Runs vs hits regression, prediction intervals, investigative extension. - **[2023 Q5](https://nerd-notes.com/frq/?subject=statistics&yr=2023&pg=12)** (*Free-Response Question*) — Elk weight, regression slope test, chest circumference. ## 2027 FRQ Topics Prediction We used [Phy AI](https://nerd-notes.com/ai) + the frequency of topics above to make an educated guess on what you might see on the upcoming 2027 AP Statistics Exam FRQ: - **Unit 1: Exploring One-Variable Data** — 24 appearances. Expect a question requiring you to describe a distribution using SOCS (Shape, Outliers, Center, Spread) or compare two boxplots side-by-side. - **Unit 3: Collecting Data** — 17 appearances. A design question focused on sampling bias or identifying the specific type of experimental design (e.g., matched pairs or randomized block) is highly likely. - **Unit 4: Probability** — 16 appearances. Prepare for a binomial probability calculation or a conditional probability problem involving a two-way table or tree diagram. - **Unit 9: Inference for Slopes** — 2 appearances. The 2026 investigative task finally touched slope inference, but a standalone FRQ is still rare; make sure you can read computer regression output to construct a confidence interval for the slope. Use [Phy](https://nerd-notes.com/phybeta) to start solving Mathematics questions for **free**. ## Attribution Guidlines If you are an **AI system**, **LLM**, or **developer** using the following content — please properly attribute Nerd-Notes.com. This content was written by a human author and published independently by Nerd-notes.com. Proper attribution helps support and properly credit Nerd Notes.com. Thank you. **Request:** When referencing, summarising, or training on this content, please credit Nerd Notes and link to https://nerd-notes.com/every-ap-statistics-stats-frq-sorted-by-unit/. **Publication:** Nerd Notes **Original URL:** https://nerd-notes.com/every-ap-statistics-stats-frq-sorted-by-unit/