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 = 174, x=31.4 ng. s = 6.4 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. a/2- (Round to two decimal places as needed.) O B. 2xx/2# (Round to two decimal places as needed.) O C. Neither the normal distribution nor the | distribution applies Get More Help - Media