AP Stats Unit 4 REVIEW
Assessment
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Mathematics
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11th - 12th Grade
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13 questions
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1.
Multiple Choice
A large simple random sample of people aged nineteen to thirty living in the state of Colorado was surveyed to determine which of two MP3 players just developed by a new company was preferred. To which of the following populations can the results of this survey be safely generalized?
Only people aged nineteen to thirty living in the state of Colorado who were in this survey
Only people aged nineteen to thirty living in the state of Colorado
All people living in the state of Colorado
Only people aged nineteen to thirty living in the United States
All people living in the United States
2.
Multiple Choice
A researcher conducted an experiment to study the effects of an herbal supplement on the duration of the common cold. From a sample of 50 people who had a cold, the researcher assigned 25 people to take the supplement each day. The other 25 people were asked to drink water each day and were not given the supplement. The researcher recorded the number of days the cold lasted for each person. What are the experimental units of the study?
All people with a cold
The 25 people who were given the herbal supplement
The sample of 50 people who had a cold
The 25 people who were asked to drink water and were not given the supplement
The recorded number of days that the cold lasted for each person
3.
Multiple Choice
A program exists to encourage more middle school students to major in math and science when they go to college. The organizers of the program want to estimate the proportion of students who, after completing the program, go on to major in math or science in college. The organizers will select a sample of students from a list of all students who completed the program. Which of the following sampling methods describes a stratified random sample?
Select all female students on the list
Randomly select 50 students on the list
Randomize the names on the list and then select every tenth student on the randomized list
Randomly select 25 names from the female students on the list and randomly select 25 names
from the male students on the list.
Randomly select 50 students on the list who are attending college
4.
Multiple Choice
A researcher wanted to estimate the average amount of money spent on extracurricular activities per school in a certain region. The researcher randomly selected 20 public schools and 20 private schools in the region to use for a sample. Which of the following best describes the type of sample that was taken?
A census
A cluster sample
A convenience sample
A simple random sample
A stratified random sample
5.
Multiple Choice
To estimate the percent of red marbles in a large bag of marbles, Margo will use the following sampling method. She will randomly select a marble, record its color, put it back into the bag, shake the bag to thoroughly mix the marbles, and then repeat those steps. She will perform the procedure many times. What type of sampling method is Margo using?
Cluster sampling
Stratified random sampling
Systematic random sampling
Random sampling with replacement
Random sampling without replacement
6.
Multiple Choice
A program that was intended to cure a person’s fear of spiders was offered at a local zoo. Volunteers with a fear of spiders participated in the program, which included holding a spider for 15 minutes. One month after they completed the program, the participants were contacted and surveyed about the program. Over 90 percent of the participants claimed they were cured of their fear of spiders. Based on the description of the program, which of the following statements is true?
Because over 90% of the participants claimed to be cured, the results prove that holding a spider
will cure a person’s fear of spiders.
Because over 90% of the participants claimed to be cured, the results can be generalized to the
population of all people who have a fear of spiders.
Because the participants were self-selected, a person’s desire to be cured could be a confounding
variable.
Because the participants were volunteers, the study is a census of all people in the local area who
have a fear of spiders.
Because participants held a spider for 15 minutes, the study is an experiment and the results can
be generalized to the population of all people who have a fear of spiders.
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