AP Statistics — Past Exams by Unit

Past Exams by Unit

Year	Question	Context	Content	Unit
1997	1	Age distributions	Cumulative Frequency Plot, median, IQR	Unit 1
1997	2	Fishtanks	Design of Experiments, blocking	Unit 3
1997	3	Disease testing	Conditional probability	Unit 4
1997	4	Voter support	2 sample z test for proportions	Unit 6
1997	5	Ovens	Matched pairs t test	Unit 7
1997	6	Used cars	Re-expressing data	Unit 2
1998	1	Sampling distributions	Sampling distibution of sample mean	Unit 5
1998	2	Number of defective items	Histograms/scatterplots	Unit 2
1998	3	Butterflies	Random assignments, chi-square tests	Unit 8
1998	4	Weed killer	Regression output, residuals	Unit 2
1998	5	Student housing	One sample z test for proportion	Unit 6
1998	6	Pearls, simulation	Normal dist, simulations, expected value	Unit 4
1999	1	Commercial aircraft	Regression output, interpret slope+intercept, residuals	Unit 2
1999	2	Hikers	Chi-square test of independence	Unit 8
1999	3	Dentist and apples	Exp. vs. obs. study, confounding variables, cause-effect	Unit 3
1999	4	Batteries	Normal, Binomial, Outliers	Unit 4
1999	5	Dice	Sample space, Expected values	Unit 4
1999	6	coin flipping	1 sample t test, matched pairs test, scatterplot	Unit 7
2000	1	drug strengths	Describing scatterplots	Unit 2
2000	2	Footprints in cave	Conditions for 1 sample t-interval	Unit 7
2000	3	Flexibility ratings	Graphing and comparing frequency distributions	Unit 1
2000	4	baby walkers	2 sample t test for difference of means, cause+effect	Unit 7
2000	5	Cholesterol drugs	Exp. Design, blocking, double-blind	Unit 3
2000	6	Heights of married couples	CI for 1 prop, combining normal RV's. indep., ellipse	Unit 6
2001	1	Rain in LA	Outliers	Unit 1
2001	2	copy machines	Expected Value	Unit 4
2001	3	coupon simulation	Simulation using random digit table	Unit 4
2001	4	Forest	Blocking, purpose of randomization	Unit 3
2001	5	pharmacies	Matched pairs t test	Unit 7
2001	6	credit hours/GPA	Comparing distributions, t test for slope, classification	Unit 9
2002	1	Newton/Einstein	Interval estimates, precision	Unit 7
2002	2	Waterproofing Boots	Matched pairs experiment, double blind	Unit 3
2002	3	Relay Team	Normal Dist, combining RV’s	Unit 4
2002	4	Commercial Airlines	Regression output, correlation, infl. Points	Unit 2
2002	5	Early Birds/Night Owls	Hypotheses, 2 sample t test	Unit 7
2002	6	S or F? F or S?	1 prop z int, interpreting c-level, 2 samp z test, pooling	Unit 6
2002B	1	swine/ammonia	scatterplot, interpret r, r2	Unit 2
2002B	2	airline overbooking	probability, expected value, conditional prob.	Unit 4
2002B	3	Magnets and pain relief	Design of Experiments, blocking	Unit 3
2002B	4	social security reform	1 sample z interval for a proportion, application	Unit 6
2002B	5	Student/Faculty obstacle course times	making graphs and comparing distributions	Unit 1
2002B	6	Lab classes (change in distributions)	2 sample t test, chi-square HOP test, changes in distributions	Unit 8
2003	1	Accuracy of watches	Boxplots, variability, choosing hypotheses	Unit 7
2003	2	Class action lawsuits	Type I and II errors and consequences	Unit 6
2003	3	neck sizes	Normal, binomial	Unit 4
2003	4	Yoga vs. Tai chi	Random assignment, control groups, generalizibility	Unit 3
2003	5	gender/response	Chi-square test of independence	Unit 8
2003	6	coaches and vans	Confidence interval for a proportions, applications	Unit 6
2003B	1	Work/Study relationship	influential points	Unit 2
2003B	2	Age and Income relationship	Conditional probability, independence	Unit 4
2003B	3	vitamin C and the flu	Exp. Vs. Obs study, 2 sample z test for proportions	Unit 6
2003B	4	coffee filters and cholesterol	random assignment, control groups, which test, reducing var.	Unit 7
2003B	5	skunk game	Prob. Rules, expected value, chi square goodness of fit	Unit 8
2003B	6	HMO CI's	CI for 1 prop, int. c-level, sample size calculations	Unit 6
2004	1	Gasoline additives	Boxplots, outliers, properties of boxplots, shape/center	Unit 1
2004	2	Shampoo	Blocking, random assignment within blocks	Unit 3
2004	3	brontosaurs	Binomial, probability, interpreting probability, generalizibility	Unit 4
2004	4	antibiotics	Probability rules, expected value	Unit 4
2004	5	hospital satisfaction	Chi-square test of independence, generalizibility	Unit 8
2004	6	Cholesterol drugs	1 sample t test, interval disagreement, one-sided CI	Unit 7
2004B	1	moon craters	Interpreting scatterplot, r-sq, transforming data, res. Plot	Unit 2
2004B	2	Dining Hall survey	Selection and response bias	Unit 3
2004B	3	Bauxite cars	Normal and sampling distribution of xbar	Unit 5
2004B	4	Time spent on HW	Two sample t interval, matched pairs	Unit 7
2004B	5	mandible lengths	Boxplots, conditions for t interval, 2 sample t-test	Unit 7
2004B	6	banded birds	2 sample z test, re-capture technique, random sampling	Unit 6
2005	1	Urban vs. Rural caloric intake	comparing stemplots, generalizibility, sampling variability	Unit 3
2005	2	mean vs. median of discrete RV	expected value/median relationship, sampling variability	Unit 4
2005	3	railcars/fuel consumption	residual plots, interpreting slope, r-sq, extrapolation	Unit 2
2005	4	cereal coupons	1 sample z test for a proportion	Unit 6
2005	5	High School diplomas	sources of bias, sample size calc, stratified samples	Unit 6
2005	6	Lead exposure	2 sample t interval, interaction plot, relationships	Unit 7
2005B	1	Test scores	Shape, center, spread of a distribution	Unit 1
2005B	2	Child and adult tickets	Mean and SD of RV, combination of RV's	Unit 4
2005B	3	Mosquitoes	randomization, completely rand. design, MP design, which test?	Unit 7
2005B	4	growth of plants	Matched pairs t interval, sig diff?	Unit 7
2005B	5	walking speed/pulse rate	Regression output, interpret slope+intercept, CI for slope	Unit 9
2005B	6	milk containers	1 sample t test, normal, prob rules, simulation	Unit 7
2006	1	Catapults	Comparing distributions, variability, center	Unit 1
2006	2	soap suds	Regression output, interpreting SD(residuals), SE(slope)	Unit 9
2006	3	Depth measurements Economics test scores Father/Daughter heights	Normal, binomial, sampling dist of xbar Depth measurements	Unit 5
2006	4	ambulance vs. self wait time	2 sample t-interval for diff of means, significant diff?	Unit 7
2006	5	Tiger shrimp	Treatments, randomization, limiting variability, generealizibility	Unit 3
2006	6	testing for variance in thermostats	Hypotheses, chi-square, simulation, power	Unit 8
2006B	1	Monthly sales	Cumulative frequency plots	Unit 1
2006B	2	defectives, day vs night	2 sample CI for diff in proportions, sig diff?	Unit 6
2006B	3	Golf balls	Normal, binomial, inverse normal	Unit 4
2006B	4	dexterity	Matched pairs t test	Unit 7
2006B	5	Tractors	response, treatments, units, rand., replication, confounding	Unit 3
2006B	6	Juice comparison	1 sample z test for a proportion, binomial, sig. level, test	Unit 6
2007	1	Strawberry Discoloration	Interpreting SD, comparing center, using CI’s	Unit 7
2007	2	Dog joint and hip health	Control groups, random assignment, blocking	Unit 3
2007	3	Big Town Fisheries	Sampling dist of x-bar, normal dist, CLT	Unit 5
2007	4	E. Coli in beef	Matched Pairs t-test	Unit 7
2007	5	Distracted drivers	Exp/Obs Study, hypotheses, conditions for 2 sample z test, interpreting p-value, conclusion.	Unit 6
2007	6	The dimly lit room	Slope, No intercept models, test for slope = 1, multiple regression ideas	Unit 9
2007B	1	Economics test scores	Stemplots, describing distributions	Unit 1
2007B	2	Number of pets	probability distributions, binomial, sampling dist of xbar	Unit 5
2007B	3	Heat gain of windows	Block design, randomization	Unit 3
2007B	4	Father/Daughter heights	LSRL, residuals, influential points	Unit 2
2007B	5	Cholesterol drugs	2 sample t test	Unit 7
2007B	6	Bird extinction on island	2 sample z test, t interval for slope, comparing methods	Unit 9
2008	1	Sugar in cereal	comparing boxplots, rescaling data, mean/median and shape	Unit 1
2008	2	School board survey	non-response bias	Unit 3
2008	3	Josephine and Crystal Arcade game	Expected value, probability rules and distributions	Unit 4
2008	4	Underwater devices	Scatterplots, describing association, mean and SE of avg of prop	Unit 6
2008	5	Moose	Chi-square goodness of fit, largest contribution	Unit 8
2008	6	Magnet school	2 sample t test, LSRL from output, test slopes, additional info	Unit 9
2008B	1	student-teacher ratios	comparing dotplots, logic of hypothesis tests	Unit 7
2008B	2	Estimators	Properties of estimators: bias and variability	Unit 5
2008B	3	Stopping distance	Sample size calculations, CI for mean	Unit 7
2008B	4	Soothing Music and Blood Pressure	Experimental Design, Type I, II errors and consequences	Unit 6
2008B	5	Snake Gulch Railway	Combining normal RV's, normal calculations	Unit 4
2008B	6	Morton's Neuroma	Scatterplots, matched pairs test, classification	Unit 7
2009	1	Gender/Work Experience	Exploring Categorical Data; association, chi-square	Unit 8
2009	2	Stopping Distances	InvNormal, Binomial, Sampling Dist of x-bar	Unit 5
2009	3	Frog Dissection	Random Assignment, Non-random assignment	Unit 3
2009	4	Ambulance Response Times	CI for diff of 2 means, sig difference?	Unit 7
2009	5	CPR/CC survival rates	Diff of 2 prop, p-value, conclusion, error+consequence	Unit 6
2009	6	Measuring skewness	Hypotheses, measuring skewness, sampling dist.	Unit 7
2009B	1	Gasoline Taxes	Boxplots, median/IQR, linear transformation of data	Unit 1
2009B	2	ELISA testing	Conditional Probability, Prob. Rules	Unit 4
2009B	3	CPR vs. cardiopump	Diff of 2 prop. Hypothesis test	Unit 6
2009B	4	Birds and pesticides	Random assignment in blocks, increasing power	Unit 6
2009B	5	Bottle Filling Machine	Hyp Test for a mean, test for SD with simulation	Unit 7
2009B	6	Relative Risk	Double blind, 2propZint, using relative risk	Unit 6
2010	1	Garlic Oil	Treatments, units, response variable; scatterplots and linearity	Unit 3
2010	2	Rock-and-roll songs	Sampling distribution of the sample mean	Unit 5
2010	3	Humane Society	Interpreting conf. level, assessing a claim with a CI, finding sample size	Unit 6
2010	4	New car customer survey	Mean and SD of binomial, binomial probability, stratified sampling	Unit 4
2010	5	Tropical Fish	Two sample t test	Unit 7
2010	6	Hurricanes	Graphing and comparing distributions, evaluating and using a new test statistic	Unit 8
2010B	1	Polluted rivers	Comparing boxplots, constructing a stemplot, stemplot vs. boxplot	Unit 1
2010B	2	Cafeteria food survey	Simple random sampling and stratified random sampling	Unit 3
2010B	3	Multiple choice questions	Binomial distribution, binomial probabilities	Unit 4
2010B	4	Digital music player	1 sample CI for a proportion, effect of sampling without replacement	Unit 6
2010B	5	Sources of news	Two-way tables, conditional probability, independence, chi-square tests	Unit 8
2010B	6	House prices with pools	Slope, residuals, estimating effect of pool, difference of slopes	Unit 9
2011	1	Speed and strength	Assessing Normality; calculating, interpreting, and comparing z-scores	Unit 1
2011	2	Politics and gender	Conditional probability, independence, segmented bar charts	Unit 4
2011	3	New carpet in apartments	Cluster sampling vs. stratified sampling	Unit 3
2011	4	Cholesterol drugs	Two-sample t test	Unit 7
2011	5	Windmills	Regression output, interpret slope, meaning of r^2, test for slope	Unit 9
2011	6	US history multiple choice	Confidence interval for p, tree diagrams	Unit 6
2011B	1	Pupil-teacher ratio	Estimating median from hist., comparing hist., mean vs. median	Unit 1
2011B	2	Fear of heights	Exp. vs. obs. study, scope of inference, purpose of random assignment	Unit 3
2011B	3	Flight upgrades	Geometric prob, binomial prob, cumulative binomial	Unit 4
2011B	4	Flu vaccine	Confidence interval for p, determining sample size	Unit 6
2011B	5	Part-time jobs and grades	Chi-square test for independence, Type I and II errors	Unit 8
2011B	6	Grass buffer strips	Interpret slope, extrapolation, dist of xbar, optimal design for estimating slope	Unit 9
2012	1	Sewing Machines	Describing scatterplots, influential points	Unit 2
2012	2	Spin the Pointer	Discrete probability distributions, expected value, normal calculations	Unit 4
2012	3	Household size	Comparing histograms, conditions for two-sample t interval	Unit 7
2012	4	Television commercials	Two-sample z test (or interval) for proportions	Unit 6
2012	5	Physical fitness	Type II errors, conclusion for 1 prop z test, using volunteers	Unit 6
2012	6	Soft drinks	Selecting a SRS, SE(mean) for SRS vs. stratified random sample	Unit 5
2013	1	Lead in crows	Stemplots, 1 sample t interval	Unit 7
2013	2	Appearance of a university	Convenience samples, selecting an SRS, stratified sampling	Unit 3
2013	3	Eggs	Normal calculation, sum of random variables	Unit 4
2013	4	Fruits and vegetables	Chi-square test for independence	Unit 8
2013	5	Meditation and blood pressure	Scope of inference, 2 prop z test conditions, logic of inference	Unit 6
2013	6	Typhoons	Comparing distributions, trends in timeplots, moving averages	Unit 2
2014	1	Extracurricular activities	Conditional relative frequency and association, chi-square	Unit 8
2014	2	Selecting convention attendees	General multiplication rule, informal inference, simulation design	Unit 4
2014	3	School attendance	Normal probability, sampling dist of xbar, probability rules	Unit 5
2014	4	Alumni income survey	Mean vs. median, sampling methods and bias	Unit 3
2014	5	Gender and car prices	Paired t test	Unit 7
2014	6	Fuel consumption rate (FCR)	Calculate/interpret residuals, comparing associations, multiple regression	Unit 2
2015	1	Accountant salaries	Comparing boxplots, making decisions using boxplots	Unit 1
2015	2	Random discounts	Using confidence intervals to make decisions, margin of error&sample size	Uni 6
2015	3	ATMs	Discrete probability distributions, expected value, conditional probability	Unit 4
2015	4	Aspirin and colon cancer	Two sample z test for difference in proportions (experiment)	Unit 6
2015	5	Body shapes	Describing scatterplots, classifying individuals, making a prediction	Unit 2
2015	6	Tortillas	Choosing a sampling method, comparing variability of sample means	Unit 5
2016	1	Robin's tips	Describing a distribution; effect of changing a value on mean, median.	Unit 1
2016	2	Choco-Zuties	Chi-square test for homogeneity; follow-up analysis	Unit 8
2016	3	Smoking and Alzheimers	Explanatory/response variables, experiment vs. obs. study, confounding	Unit 3
2016	4	Rocket ignitors	Multiplication rule, geometric probability, informal p-value and conclusion	Unit 4
2016	5	Environment vs. economy	1 prop z interval, large counts condition, why 2 prop z interval not OK	Unit 6
2016	6	Semesters and salary	Describing scatterplots, int.slope from output, medians, third variable.	Unit 2
2017	1	Gray wolves	Describing a scatterplot, interpreting slope, residual calculations	Unit 2
2017	2	Water cups	1 prop z interval, converting endpoints to a total	Unit 6
2017	3	Melons	Normal probability, multiplication rule, conditional probability (trees)	Unit 4
2017	4	Pottery chemicals	Comparing boxplots, using boxplots to classify	Unit 1
2017	5	Schizophrenia	Chi-square test for independence	Unit 8
2017	6	Coins vs. chips	Random assignment: probabilities of different arrangements, which is best	Unit 4
2018	1	Waiting in line	Interpret intercept and r2, identify outlier in scatterplot	Unit 2
2018	2	Do you recycle?	Calculate n for 1propzint; explain how bias affects point estimate; randomized response	Unit 6
2018	3	Multiple births and lefties	Multiplication rule, conditional probability, binomial	Unit 4
2018	4	ACL surgery	Scope of inference for experiment, 2 sample t test	Unit 7
2018	5	Teachers experience	Medians from histograms; mean from combined sample; mean +/- SD on histogram	Unit 1
2018	6	Blood pressure	Type II error; calculating power; how sample size affects power	Unit 7
2019	1	Dorm rooms	Describing bimodal histogram, finding outliers, making boxplot, boxplots vs. histograms	Unit 1
2019	2	Fungus mixtures	Components of an experiment, control group, random assigment method	Unit 3
2019	3	Taking medicine	Two-way table probabilities, justifying independence, binomial calculation	Unit 4
2019	4	Tumbleweeds	Two-sample z test for proportions (one-sided)	Unit 6
2019	5	Smartphone batteries	Percentile from normal, area from normal, expected value	Unit 4
2019	6	Emma's apartments	Scope of inference, mean/median, developing sampling dist, bootstrapping a median	Unit 7
2021	1	Hospital length of stay	5-number suimmary, identifying outliers, comparing outlier rules	Unit 1
2021	2	Walking and cholesterol	Response bias, purpose of random sampling, cause and effect for obs study	Unit 3
2021	3	Gift card lottery	Binomial RV def. and calc., exp value calc and interpret, informal inference	Unit 4
2021	4	$10 off next purchase	One-sample z test for a proportion, Type I/II error and consequence	Unit 6
2021	5	Soda in Baltimore	Calculations with two-way tables, segmented bar charts, chi-sq homogeneity hypotheses	Unit 8
2021	6	Baseball attendance	Comparing boxplots, associations in scatterplots with 3rd variable, confounding	Unit 3
2022	1	Bullfrogs	Describe scatterplot, interpret slope and r2, identify and analyze largest residual	Unit 2
2022	2	Acne treatments	Identify parts of an experiment, advantage of pairing, random assignment to pairs	Unit 3
2022	3	Shampoo bottles	Normal probability, binomial random variable and probability, compare methods	Unit 4
2022	4	Video streaming	One-sample z interval for p, using interval to assess claim	Unit 6
2022	5	Dark vs white chocolate	Medians from dotplots, random chance explanation, simulation-based inference	Unit 7
2022	6	Allergy clinics	Table of rel freq, Obs study vs. experiment, interpreting mosaic plots, Simpson's paradox	Unit 3
2023	1	Alaskan Streams	Describing a distribution, constructing a boxplot, making decisions with boxplots.	Unit 1
2023	2	Fiber Driveways	Identifying experimental units, treatments, response variable, describing random	Unit 3
2023	3	Bath Fizzys	Probability, conditional probability, expected value	Unit 4
2023	4	OMEGA-3 Supplement	Matched pairs t test	Unit 7
2023	5	Tule Elk	Describe scatterplot, making a prediction, residual, interpreting slope, p-value and conclusion for test of slope	Unit 9
2023	6	Cleo Gold Necklaces	Normal probability calculation, sampling distribution of xbar, significance test conclusion, sampling distribution of range, conditional probability.	Unit 5