Khan Academy AP Statistics
Study online at https://quizlet.com/_6j8ywm
1. Researchers were studying how playing a dancing a paired t interval for mean
video game impacts heart rate. They measured the difference
heart rates (in beats per minute) of 151515 subjects be-
fore 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.
2. The owners of a large shopping complex wondered x^2 test of independence
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.
3. According to the distributor of a kind of trading x^2 goodness of fit test
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 dis-
tribution, so she took a random sample of 500500500
cards and recorded their rarity levels.
4. Lylah created an app, and she recently updated the z interval for proportion
app. She randomly samples a group of users to esti-
mate what percentage of all users are using the updat-
ed version.
5. Raul lives in Richmond and his brother Alejandro lives A two-sample ttt-test for
in Aberdeen. They both complained about the high the difference of means
prices of avocados where they live, so they wondered
1/6
, Khan Academy AP Statistics
Study online at https://quizlet.com/_6j8ywm
if, on average, avocados were more expensive 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.
6. A college professor wonders if there is a relationship slope test
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).
7. People applying for a driver's license In California usu- t interval for a mean
ally 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.
8. Apgar score is a number between 000 and 101010 that A paired ttt-test for the
gives a measure of the physical condition of a new- mean difference
born 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 sec-
ond-born twin's score.
9. Ying's favorite candy is available with or without A \chi^2χ
peanuts. He wonders if the color distribution is the 2
same for both varieties, so he buys a large bag with test for homogeneity
peanuts and a large bag without peanuts and tallies
the colors in each bag.
10. x^2 goodness of fit
2/6
Study online at https://quizlet.com/_6j8ywm
1. Researchers were studying how playing a dancing a paired t interval for mean
video game impacts heart rate. They measured the difference
heart rates (in beats per minute) of 151515 subjects be-
fore 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.
2. The owners of a large shopping complex wondered x^2 test of independence
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.
3. According to the distributor of a kind of trading x^2 goodness of fit test
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 dis-
tribution, so she took a random sample of 500500500
cards and recorded their rarity levels.
4. Lylah created an app, and she recently updated the z interval for proportion
app. She randomly samples a group of users to esti-
mate what percentage of all users are using the updat-
ed version.
5. Raul lives in Richmond and his brother Alejandro lives A two-sample ttt-test for
in Aberdeen. They both complained about the high the difference of means
prices of avocados where they live, so they wondered
1/6
, Khan Academy AP Statistics
Study online at https://quizlet.com/_6j8ywm
if, on average, avocados were more expensive 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.
6. A college professor wonders if there is a relationship slope test
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).
7. People applying for a driver's license In California usu- t interval for a mean
ally 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.
8. Apgar score is a number between 000 and 101010 that A paired ttt-test for the
gives a measure of the physical condition of a new- mean difference
born 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 sec-
ond-born twin's score.
9. Ying's favorite candy is available with or without A \chi^2χ
peanuts. He wonders if the color distribution is the 2
same for both varieties, so he buys a large bag with test for homogeneity
peanuts and a large bag without peanuts and tallies
the colors in each bag.
10. x^2 goodness of fit
2/6
