When is it OK to use a confidence interval instead of computing a p value in a h

ID: 3131251 • Letter: W

Question

When is it OK to use a confidence interval instead of computing a p value in a hypothesis test?

Select one:

a. In any significance test.

b. In any hypothesis test with a two-sided alternative hypothesis.

c. Only when the hypothesized value of the parameter is not in the confidence interval.

d. Only when you are conducting a hypothesis test with a one-sided alternative.

e. Only when doing a test for a single population mean.

2. Which of the following best describes what we mean when we say that t procedures are robust?

Select one:

a. The t procedures work well with almost any distribution.

b. Its numerical value is not affected by outliers.

c. The t procedures will still work reasonably well even if the assumption of normality is violated.

d. t procedures can be used as long as the sample size is at least 40.

e. t procedures are an accurate as z procedures.

3. Which of the following conditions doesn't need to be met before you can use a two-sample procedure?

Select one:

a. The responses in each group are independent of each other.

b. Each group is considered to be a sample from a distinct population.

c. The same variable is measured in both samples.

d. The goal is to compare the means of the two groups.

e. Data in two samples are matched together in pairs that are compared.

1. When is it OK to use a confidence interval instead of computing a p value in a hypothesis test?

b. In any hypothesis test with a two-sided alternative hypothesis.

2. Which of the following best describes what we mean when we say that t procedures are robust?

c. The t procedures will still work reasonably well even if the assumption of normality is violated.

3. Which of the following conditions doesn't need to be met before you can use a two-sample procedure?

e. Data in two samples are matched together in pairs that are compared.

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