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Exercise 09.23 (Population Mean: Sigma Unknown) Consider the following hypothesis test: Ho: p 12 Ha : u > 12 A sample of 25 provided a sample mean I = 14 and a sample standard deviation s = 4.32 a. Compute the value of the test statistic (to 2 decimals). -1.54 b. Use the t distribution table (Table 2 in Appendix B) to compute a range for the p-value. The p-value is between 0.10 and 0.20 C. At @ = 0.05, what is your conclusion? Do not reject null hypothesis v d. What is the rejection rule using the critical value? (Use a = 0.05.) Reject Ho if t is greater than the critical value of -2.012 (to 3 decimals). Can you conclude that the population mean is greater than 12? No Icon Key Exercise 09.23 (Population Mean: Sigma Unknown)