Please answer all 4 parts.

A. State the appropriate null and alternate hypotheses.

H0:

H1:

This hypothesis is a (left-tailed or right-tailed) test.

B. Compute the P-value. Round the answer to at least four decimal places.

C. Determine whether to reject H0. Use the =0.10 level of significance.

D. State a conclusion.

There (is or is not) enough evidence to conclude that the mean time of Facebook visits has decreased.

Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 19.8 minutes. Assume the standard deviation is 6 = 10.0 minutes. Suppose that a simple random sample of 101 visits was selected this year and has a sample mean of ;= 22.8 minutes. A social scientist is interested to know whether the mean time of Facebook visits has increased. Use the a = 0.10 level of significance and the Pvalue method with the TI-84 calculator. (a) State the appropriate null and alternate hypotheses. (b) Compute the P-value. (c) State a conclusion. Use the a = 0.10 level of signicance