MODULEINFERENCE FOR RELATIONSHIPS CONTINUEDINFERENCE FOR RELATIONSHIPS CHECKPOINT

Step 1 of 1

The following questions present you with a scenario, and you need to choose the most appropriate statistical test in each case.

Question 1 of 8Points: 10

At the beginning of the semester, students who registered for a statistics course were randomly assigned to two sections, each taught by a different instructor. At the end of the semester, we would like to test whether there are differences in performance on the final exam between the two sections.

matched pairs t-test

two-sample t-test

ANOVA

chi-squared test for independence

inference for regression

Question 2 of 8Points: 10

We suspect that automobile insurance premiums (in dollars) may be steadily decreasing with the driver's driving experience (in years), so we choose a random sample of drivers who have similar automobile insurance coverage and collect data about their ages and insurance premiums.

matched pairs t-test

two-sample t-test

ANOVA

chi-squared test for independence

inference for regression

Question 3 of 8Points: 10

To test whether Internet use increases depression score, we measure the depression scores of a random sample of non-Internet-users, have them use the Internet for a specified time, then measure their depression scores again.

matched pairs t-test

two-sample t-test

ANOVA

chi-squared test for independence

inference for regression

Question 4 of 8Points: 10

We select random samples from several racial categories (Caucasian, African-American, Hispanic, Asian-American) to determine if there is a difference in overall mean earnings among the groups.

matched pairs t-test

two-sample t-test

ANOVA

chi-squared test for independence

inference for regression

Question 5 of 8Points: 10

We want to explore the relationship between the prices of diamond rings and the weights of their diamond stones.

matched pairs t-test

two-sample t-test

ANOVA

chi-squared test for independence

inference for regression

The next three questions refer to the following information:

Suppose an economist wishes to determine the relationship between the age and price of houses. A study yields the following data:

For each question below, choose the most appropriate inference method to analyze these data, under the given scenarios.

Question 6 of 8Points: 10

If column 1 is the price (in thousands of dollars) of a sample of five houses from ten years ago, and column 2 is the price (in thousands of dollars) of a sample of a different five houses from today, which of the following is the appropriate inference method?

matched pairs

two independent samples

inference for regression

Question 7 of 8Points: 10

If column 1 is the age of the home in years, and column 2 is the price of the home (in thousands of dollars), which of the following is the appropriate inference method?

matched pairs

two independent samples

inference for regression

Question 8 of 8Points: 10

If column 1 is the price (in thousands of dollars) of a sample of five houses from ten years ago, and column 2 is the price (in thousands of dollars) of the same homes today, which of the following is the appropriate inference method?

matched pairs

two independent samples

inference for regression

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