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Khan Academy AP Statistics Exam Questions and Answers
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Khan Academy AP Statistics Exam Questions and Answers Researchers were studying how playing a dancing video game impacts heart rate. They measured the heart rates (in beats per minute) of 151515 subjects before they danced a song and again after they finished dancing the song. They want to use ...

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  • November 11, 2024
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  • 2024/2025
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Khan Academy AP Statistics Exam

Questions and Answers


Researchers were studying how playing a dancing video game impacts heart rate. They measured the

heart rates (in beats per minute) of 151515 subjects before they danced a song and again after they

finished dancing the song. They want to use these results to estimate the average difference between

before and after heart rates. - ANSWER✔✔-a paired t interval for mean difference


The owners of a large shopping complex wondered if there was a relationship between how customers

traveled to the complex and whether or not they made a purchase. They observed a random sample of

100100100 customers and categorized each of them based on transportation method and whether or

not they made a purchase. - ANSWER✔✔-x^2 test of independence


According to the distributor of a kind of trading card, 66\%66%66, percent of the cards are common,

25\%25%25, percent are uncommon, and 9\%9%9, percent are rare. Avery wondered if the rarity levels

of the cards she and her friends owned followed this distribution, so she took a random sample of

500500500 cards and recorded their rarity levels. - ANSWER✔✔-x^2 goodness of fit test


Lylah created an app, and she recently updated the app. She randomly samples a group of users to

estimate what percentage of all users are using the updated version. - ANSWER✔✔-z interval for

proportion


Raul lives in Richmond and his brother Alejandro lives in Aberdeen. They both complained about the

high prices of avocados where they live, so they wondered if, on average, avocados were more expensive



Copyright ©Stuvia International BV 2010-2024 Page 1/6

, Copyright © OLIVIAWEST 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED


in one of their cities. Each of them took a random sample of shops in their city and got the price of

avocado from each shop. - ANSWER✔✔-A two-sample ttt-test for the difference of means


A college professor wonders if there is a relationship between how long students spend on their

midterm exam and their resulting score. The professor picks a random sample of students to observe

and notes each of their times (in minutes) and their scores (from 000 to 100100100). - ANSWER✔✔-

slope test


People applying for a driver's license In California usually need to take a multiple choice test as a part of

the application process. An administrator of these tests wants to estimate the average number of

questions that people get correct on the test. They take a random sample of scores from 100100100

testers. - ANSWER✔✔-t interval for a mean


Apgar score is a number between 000 and 101010 that gives a measure of the physical condition of a

newborn infant. Researchers collected the Apgar scores of 202020 sets of identical twins to test if the

first-born twin's score was, on average, different than the second-born twin's score. - ANSWER✔✔-A

paired ttt-test for the mean difference


Ying's favorite candy is available with or without peanuts. He wonders if the color distribution is the

same for both varieties, so he buys a large bag with peanuts and a large bag without peanuts and tallies

the colors in each bag. - ANSWER✔✔-A \chi^2χ


2


test for homogeneity


Do people pick random numbers uniformly? Kiley asked 100100100 randomly selected people to pick a

random whole number from 111 to 101010 and tallied how often each number was chosen. -

ANSWER✔✔-x^2 goodness of fit

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