For a sample of 400 individuals who filed a tax return between April 10 and 15, the sample mean refund was $910. Based on prior experience, a population standard deviation of = $1,600

may be assumed.

What is the p-value? (Round your answer to four decimal places.)

p-value =_________________ the answer is not .0846

2.)

Consider the following hypothesis test.

H₀: 12

H_a: > 12

A sample of 25 provided a sample mean x = 14

and a sample standard deviation s = 4.39.

(a)

Compute the value of the test statistic. (Round your answer to three decimal places.)

___________________________

What is the rejection rule using the critical value? (If the test is one-tailed, enter NONE for the unused tail. Round your answer to three decimal places.)

test statistic ______________________

test statistic ______________________