# Question

Refer to Exercise 9.13. Explain what each of the following would mean.

a. Type I error

b. Type II error

c. Correct decision

Now suppose that the results of carrying out the hypothesis test lead to nonrejection of the null hypothesis. Classify that conclusion by error type or as a correct decision if in fact last year's mean local monthly bill for cell phone users

d. Equals the 2007 mean of $49.94.

e. Is less than the 2007 mean of $49.94.

a. Type I error

b. Type II error

c. Correct decision

Now suppose that the results of carrying out the hypothesis test lead to nonrejection of the null hypothesis. Classify that conclusion by error type or as a correct decision if in fact last year's mean local monthly bill for cell phone users

d. Equals the 2007 mean of $49.94.

e. Is less than the 2007 mean of $49.94.

## Answer to relevant Questions

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