Consider the following hypothesis test: H0: ,Ll = 15 Ha: ,u 75 15 A sample of 40 provided a sample mean of 14.12. The population standard deviation is 3. Enter negative value as negative number. a. Compute the value of the test statistic (to 2 decimals). -135 0 b. What is the pvalue (to 4 decimals)? Use the value of the test statistic rounded to 2 decimal places in your calculations. .0643 0 c. Using a = 0.05, can it be concluded that the population mean is not equal to 15? @ d. What is the rejection rule using the critical value? Reject H0 if z is 0 the lower critical value and is 0 the upper critical value. Using a = 0.05, what are the critical values for the test statistic? (+ or -) 1.96 9 (to 2 decimals) Can it be concluded that the population mean is not equal to 15? @