Preparing to Conduct Inference for Two-Way Tables — Quiz

Question 1

The principal would like to know if these data provide convincing evidence that the distribution of responses differs across the grades in the population of all students in her school. What is the appropriate inference procedure?

Revolt · Accepted Answer

chi-square test for homogeneity because the data come from independent random samples

Question 2

The principal would like to know if these data provide convincing evidence that the distribution of responses differs across the grades in the population of all students in her school. The random and 10 percent conditions are met. Is the Large Counts condition met?

Revolt · Accepted Answer

Yes, the smallest expected count is 23 point 7 5 , so all expected counts are at least 5 .

Question 3

The pollster would like to know if these data provide convincing evidence of a relationship between residential status and political party in the population of all registered voters in Allegheny County. The random and 10 percent conditions are met. Is the Large Counts condition met?

Revolt · Accepted Answer

Yes, the smallest expected count is 8 point 6 4 , so all expected counts are at least 5 .

Question 4

The organizer for the concert would like to know if these data provide convincing evidence of a relationship between age and whether they are going to tonight’s concert in the population of all people from the city. What is the appropriate inference procedure?

Revolt · Accepted Answer

chi-square test for association/independence because the data come from one random sample

Question 5

The principal would like to know if these data provide convincing evidence of a relationship between grade and having a driver’s license in the population of all students in this school. The random and 10 percent conditions are met. Is the Large Counts condition met?

Revolt · Accepted Answer

Yes, the smallest expected count is 12 point 4 3 , so all expected counts are at least 5 .

Question 6

The principal would like to know if these data provide convincing evidence of a relationship between grade level and having a driver’s license in the population of all students in her school. What is the appropriate inference procedure?

Revolt · Accepted Answer

chi-square test for association/independence because the data come from one random sample

Question 7

The researcher would like to know if these data provide convincing evidence that the distribution of snack choice differs for the various room colors in the population of all volunteers like these. What is the appropriate inference procedure?

Revolt · Accepted Answer

chi-square test for homogeneity because the data come from independent treatment groups

Question 8

The researcher would like to know if these data provide convincing evidence that the distribution of snack choice differs for the various room colors in the population of all volunteers like these. Are the conditions for inference met?

Revolt · Accepted Answer

Yes, all three conditions for inference are met.

Question 9

The pollster would like to know if these data provide convincing evidence of a relationship between residential status and political party in the population of all registered voters in Allegheny County. What is the appropriate inference procedure?

Revolt · Accepted Answer

chi-square test for association/independence because the data come from one random sample

Question 10

The manager would like to know if these data provide convincing evidence of an association between the shift worked and being on time in the large population of all workers at this warehouse. The random and 10 percent conditions are met. Is the Large Counts condition met?

Revolt · Accepted Answer

No, the smallest expected count is 4 point 4 6 , so the expected counts are not all at least 5 .

Preparing to Conduct Inference for Two-Way Tables — Quiz Answers

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