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Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.1 minutes. Assume the standard deviation is 0:70 minutes. Suppose that a simple random sample of 103 visits was selected this year and has a sample mean of ;=22.1 minutes. A social scientist is interested to know whether the mean time of Facebook visits has changed. Use the (1:0.05 level of significance and the P-value 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 (1:0.05 level of significance. Part: 0 / 4 Part 1 of4 (a) State the appropriate null and alternate hypotheses. H0: [3 HO This hypothesis test is a (choose one) V test