The test statistic of z = - 2.28 is obtained when testing the claim that p = 1 / 6. a. Using a significance level of a = 0.01, find the critical value(s). b. Should we reject Ho or should we fail to reject Ho? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. a. The critical value(s) is/are z = (Round to two decimal places as needed. Use a comma to separate answers as needed.) b. Choose the correct conclusion below. O A. Fail to reject Ho. There is not sufficient evidence to warrant rejection of the claim that p = 1 / 6. O B. Reject Ho . There is sufficient evidence to warrant rejection of the claim that p = 1 / 6. O C. Fail to reject Ho. There is sufficient evidence to warrant rejection of the claim that p = 1 / 6. O D. Reject Ho. There is not sufficient evidence to warrant rejection of the claim that p = 1 / 6