Assume that we want to construct a confidence interval. Do one of the following, as appropriate. (a) Find the critical value Za/2. (b) find the critical value ta/2, or (c) state that neither the normal nor the t distribution applies. Confidence level is 95%, o = 26.6, and the histogram of right-eye vision measurements from a random sample of 66 adult males is shown to the right. Frequency 40 30- 20 10 of 0 50 100 150 200 Vision in Right Eye Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. Za/2 (Round to two decimal places as needed.) OB. ta/2 (Round to two decimal places as needed.) OC. Neither the normal nor the t distribution applies. Next Q

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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 Za/2. (b) find the critical value ta/2, or (c) state that neither the normal nor the t distribution applies. Confidence level is 95%, o = 26.6, and the histogram of right-eye vision measurements