Question 19

You may need to use the appropriateappendix tableortechnologyto answer this question.

The average U.S. daily internet use at home is two hours and twenty minutes. A sample of81homes in a certain city showed an average usage of one hour and45minutes with a standard deviation of70minutes. We are interested in determining whether or not the average usage in that city is significantly different from the U.S. average.

(a)State the null and alternative hypotheses (in minutes) to be tested. (Enter != foras needed.)

H₀:

H_a:

(b)Compute the test statistic.

(c)The null hypothesis is to be tested using= 0.05. Determine the critical value(s) for this test. (Round your answer(s) to two decimal places. If the test is one-tailed, enter NONE for the unused tail.)

test statistic

test statistic

(d)What do you conclude?

-RejectH₀. We cannot conclude that the average usage in that city is significantly different from the U.S. average.

-RejectH₀. We can conclude that the average usage in that city is significantly different from the U.S. average.

-Do not rejectH₀. We cannot conclude that the average usage in that city is significantly different from the U.S. average.

-Do not rejectH₀. We can conclude that the average usage in that city is significantly different from the U.S. average.