A sample of adults was asked how many hours per week they spend on watching television.

The following display from a TI-84 Plus calculator presents the results of a hypothesis test regarding the mean number of hours per week spent watching television.

a. State the null and alternate hypotheses.

b. What is the value of ̄x?

c. What is the value of s?

d. How many degrees of freedom are there?

e. Do you reject H0 at the 0.05 level? State a conclusion.

f. Someone wants to test the hypothesis H0: μ = 22.5 versus H1: μ ≠ 22.5. Use the information in the display to compute the t statistic for this test.
g. Compute the P-value for the test in part (f).
h. Can the null hypothesis in part

(f) be rejected at the 0.05 level? State a conclusion.

Transcribed Image Text:

H=20 T-Test t=1.206976206 R2347112421 x=20.75 Sx=3.93 n=40