QUESTION 4 Suppose that you want to test hypothesis given by Ho:H = 7 H1:H # 7 using an unconventional significance level of 8%. Your data consist of 100 observations and the standard deviation is known to be 3. Find the decision rule based on the critical values. (Round numbers at the second decimal place.) a. Reject the null hypothesis if the sample average is smaller than 6.12 or greater than 7.88. O b. Reject the null hypothesis if the sample average lies between 6.47 and 7.53. O C. Reject the null hypothesis if the sample average lies between 6.12 and 7.88. O d. Reject the null hypothesis if the sample average is smaller than 6.47 or greater than 7.53. O e. Reject the null hypothesis if the sample average is smaller than 5.6 or greater than 8.4