The next four questions refer to the following situation:

The average U.S. daily internet use at home is one hundred forty minutes. A sample of 64 homes in Soddy-Daisy showed an average usage of one hundred fifty minutes with a sample standard deviation of 80 minutes. We are interested in determining whether or not the average usage in Soddy-Daisy is significantly more than the U.S. average.

In the provided blank, insert the letter that corresponds with the correct answer. For example, if the correct answer is "a. 2.5", insert "a" as the correct answer.

I. State the null and the alternative hypotheses Blank 1

a. H₀: 140; H_a: < 140

b. H₀: 140; H_a: > 140

c. H₀: = 140; H_a: 140

d. H₀: < 140; H_a: 140

II. The null hypotheses is to be tested at 90% confidence. Determine the critical value(s) for this test Blank 2

a. -1.295

b. 1.295

c. -1.28

d. 1.28

III. Compute the estimated or statistical value Blank 3

a. -1

b. 1.295

c. -1.295

d. 1

IV. Based on the test, what do you conclude? Blank 4

a. Do not reject H₀ and conclude that the average usage in Soddy-Daisy is more than the U.S. average

b. Do not reject H₀ and conclude that the average usage in Soddy-Daisy is not more than the U.S. average

c. Reject H₀ and conclude that the average usage in Soddy-Daisy is more than the U.S. average

d. Reject H₀ and conclude that the average usage in Soddy-Daisy is not more than the U.S. average