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 z/2, or (c) state that neither the normal...

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 z/2, or (c) state that neither the normal distribution nor the t distribution applies. 2- 1.6- 1.2- 0.8- 0.4- 0- -0.4 4200 8400 12600 16800 21000 -0.8 The confidence level is 90%, o is not known, and the normal quantile plot of the 17 salaries (in thousands of dollars) of basketball players on a team is as shown. -1.2- -1.6- -2. X Values Select the correct choice below and, if necessary, fill in the answer box to complete your choice. 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. Z score