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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 ta/2. (b) find the critical value Za/2, or (c) state that neither the normal distribution nor the t distribution applies. The confidence level is 90%, a is not known, and the histogram of 57 player salaries (in thousands of dollars) of football players on a team is as shown. B. (Round to two decimal places as needed.) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. ta/2= ²a/2= (Round to two decimal places as needed.) C. Neither the normal distribution nor the t distribution applies. Frequency Get more help. 40 30- 20- 10- 0 4000 8000 12000 16000 20000 Salary (thousands of dollars) Clear all 13 G Check answer