28.Perform hypothesis testing about the population mean, mu. Here's the data you need: Xbar=22, rho=6, n=25 A pharmaceutical company wants to find out if a cholesterol reducing drug reduces cholesterol by more than 22 points or not. It hopes to prove the improvement will be greater than 22 points. . a. Write out the null and alternative hypotheses using the proper format b. Calculate the appropriate test statistic C. Determine the critical value based on alpha=.05 d. Draw a small diagram that's appropriate e. What are results of hypothesis testing using the critical value method f. What are the results of the hypothesis testing using the p-value method