TextRequest reports that adults 18 24 years old send and receive 128 texts every day. Suppose we take a sample of 25 34 year olds to see if their mean number of daily texts differs from the mean for 18 24 year olds reported by TextRequest. a. Select the null hypothesis we should use to test whether the population mean daily number of texts for 25 34 year olds differs from the population daily mean number of texts for 18 24 year olds. 1. Ho: Ju.=128 2.H0: 11.75128 3. HQ: #> 128 |1 vlk'!' Select the alternative hypothesis we should use to test whether the population mean daily number of texts for 25 34 year olds differs from the population daily mean number of texts for 18 24 year olds. 1. Ha: ,u, # 128 2. H3: 11. = 128 3. Ha: p. > 128 l1 vIK'L\" b. Suppose a sample of thirty 25 34 year olds showed a sample mean of 118.6 texts per day. Assume a population standard deviation of 33.17 texts per day and compute the p-value. Round your answer to four decimal places. 0 c. With a: = 0.05 as the level of signicance, what is your conclusion? | Do not reject v| K20 H0. We| cannot V| M conclude that the population mean daily texts for 25 34 year olds differs significantly from the population mean of 128 daily texts for 18 24 year olds. d. Repeat the preceding hypothesis test using the critical value approach. The critical value(s) is(are) I +1-1.96 VI w. Can it be concluded that the population mean differs from 128? || 9