A medical investigation claims that the average number of infections per week at a hospital in southwestern Pennsylvania is 16.3. A random sample of 10 weeks had a mean number of 17.7 infections. The sample standard deviation is 1.8. Is there enough evidence to reject the investigator's claim at = 0.05? Assume the variable is normally distributed. a. State the null and alternative hypotheses b. Compute the test value and compare with the critical value c. Compute the P-value and compare with d. Decide whether you reject or fail to reject the null hypothesis e. Make a conclusion about the claim of the hypothesis test using simple and nontechnical terms