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Homework: We... Question 8, 7.2.8-T HW Score: 54.7%, 54.7 of 100 points O Points: 0 of 6 Save P Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value to /2, (b) find the critical value za / 2, or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights of newborn girls: n = 256, x = 31.7 hg, s =6.8 hg. The confidence level is 90%. . . . . . Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. ta/2= (Round to two decimal places as needed.) O B. Za/2= (Round to two decimal places as needed.) O C. Neither the normal distribution nor the t distribution applies