9. [24/396, o Unknown] Consider the following hypothesis test: Ho: u = 18 and Ha: u ‡ 18. A sample of 48 provided a sample mean, x of 17 and a population standard deviation, s = 4.5 a. Compute the value of the test statistic. b. Use the t distribution table to compute a range for the p - value. c. At a = 0.05, what is your conclusion? d. What is the rejection rule using the critical value? What is your conclusion?

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