Exam 2 - PSYC 109

How many students participated in the survey?

• 38 students

• 30 students

• 68 students

• 136 students

The table, shown below, displays the data collected from a random group of high school students regarding whether they "liked" snowboards and/or "liked" skateboards. How many students said they like snowboards? What type of Probability is this?

• Marginal probability

• Joint probability

• Conditional probability

• Cumulative probability

Tags

CCSS.HSS.CP.A.3

CCSS.HSS.CP.A.5

How many students like snowboards, but do not like skateboards? What type of frequency is this?

• Union of events

• Simple probability

• Conditional probability

• Joint probability

Tags

CCSS.HSS.CP.A.3

CCSS.HSS.CP.A.5

Ursula interviewed 75 people to see if they liked reading comic books. Of the people surveyed, 15 were males. In all, 32 females liked comic books, and 9 males liked comic books. How many females did not like comic books?

• 43

• 32

• 28

• 19

Tags

CCSS.8.SP.A.4

What is the conditional frequency that a person does not like comic books given that the person is a male?

• 0.2

• 0.4

• 0.6

• 0.8

Tags

CCSS.8.SP.A.4

What is the approximate joint frequency that a person was 21–35 and did not recycle?

• 10%

• 20%

• 30%

• 40%

Tags

CCSS.8.SP.A.4

What is the approximate frequency that a person surveyed was 51–65 years old given that he or she recycles?

• 10%

• 20%

• 30%

• 40%

Tags

CCSS.8.SP.A.4

Based on this survey, is it more likely that a 21–35 year old recycles or a 51–65 year old recycles? Use conditional frequencies to justify your answer.

• A 21–35 year old is more likely to recycle.

• A 51–65 year old is more likely to recycle.

• Both age groups are equally likely to recycle.

• There is not enough information to determine.

Tags

CCSS.8.SP.A.4

Complete the following frequency table. Is it more likely that people who have a job have a savings account?

• Yes, it is more likely that people who have a job have a savings account.

• No, it is not more likely that people who have a job have a savings account.

• The likelihood is the same for people with or without a job.

• There is not enough information to determine the likelihood.

Tags

CCSS.8.SP.A.4

In hypothesis testing, what is a Type I error?

• Failing to reject a true null hypothesis

• Rejecting a true null hypothesis

• Failing to reject a false null hypothesis

• Rejecting a false null hypothesis