Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value t/2, (b) find the critical value za/2. or (c) state that neither the normal...

Pick a, b, or c

Extracted text: Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value t/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= 227, x = 30.9 hg, s= 6.7 hg. The confidence level is 99%. 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.) B. Za/2 =|2.58 (Round to two decimal places as needed.) OC. Neither the normal distribution nor the t distribution applies.