Multiple Samples

Question 1

A survey was conducted asking people about their favorite fruit. Which inferences about the population are true based on the data? Check all that apply.

Revolt · Accepted Answer

A: About twice as many people prefer apples as prefer bananas.; B: Bananas are preferred much less frequently than apples or oranges.; E: The samples show little variation for each fruit.

Question 2

In two sample surveys, 125 people were asked about their favorite fruit. In the first survey, 40 people chose apples, 64 chose oranges, and 21 chose bananas. In the second, 43 chose apples, 63 chose oranges, and 19 chose bananas. Marianne inferred that most people prefer oranges. Is this inference true based on the data? Explain.

Revolt · Accepted Answer

Marianne made an inference that is true based on the data. More than half of all the people surveyed in each sample chose oranges as their favorite fruit. Since most people in each sample chose oranges, it is likely that oranges are the favorite fruit of the entire population.

Question 3

For women, the most frequently worn item of clothing is .

Revolt · Accepted Answer

pants

Question 4

Which inference is true?

Revolt · Accepted Answer

C: About the same number of students spend 0-30 minutes on homework as spend 31-60 minutes.

Question 5

Take two samples of fish from a pond and analyze the results. What is the average number of bass found in both samples? What is the ratio of the average number of bass to the average number of fish in each sample?

Revolt · Accepted Answer

B: 7

Question 6

The table shows two samples of fish from a pond. If 400 fish are in the pond, which proportion represents the average number of bass you would expect to live in the pond?

Revolt · Accepted Answer

C:

Question 7

The expected number of trout in the population is .

Revolt · Accepted Answer

1,000

Question 8

Which are valid inferences? Check all that apply.

Revolt · Accepted Answer

B: About twice as many trout were in the pond at the time the second sample was taken.; D: Fewer bass were in the pond at the time the second sample was taken.; E: About the same number of catfish were found in both samples.

Question 9

Make an inference about which fish increased its predicted average population from Year 1 to Year 2.

Revolt · Accepted Answer

B: Trout increased its predicted average population.

Question 10

Which ideas did you include in your response?

Revolt · Accepted Answer

A: Both samples showed most people choosing oranges.; B: The mean of the frequencies of people choosing oranges is the greatest.; C: The samples showed little variation.

Multiple Samples Answers

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