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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 - 285, x= 31.1 hg, s=6.8 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.) O B. Za/2- (Round to two decimal places as needed.) C. Neither the normal distribution nor the t distribution applies. ?) Click to select and enter your answer(s) DELLAssume 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 40 distribution nor the t distribution applies. 30 The confidence level is 90%, o is not known, and the histogram of 64 player salaries (in thousands of Frequency 20 dollars) of football players on a team is as shown. o 4000 8000 12000 16000 20000 Salary (thousands of dollars) 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.) OC. Neither the normal distribution nor the t distribution applies. X VI VO More ? Click to select and enter your answer(s) ce B. DELLRefer to the accompanying data display that results from a sample of airport data speeds in Mops. Complete parts (a) through (c) below. TInterval (13.046,22.15) x =17.598 SX = 16.01712719 n =50 a. Express the confidence interval in the format that uses the "less than" symbol. Given that the original listed data use one decimal place, round the confidence interval limits accordingly. Mops