Question: Finding Critical t Values When finding critical values, we often need significance levels other than those available in Table A-3. One approach is to approximate

Finding Critical t Values When finding critical values, we often need significance levels other than those available in Table A-3. One approach is to approximate critical t values by calculating t = 2df # 1eA2>df - 12 where df = n - 1, e = 2.718, A = z18 # df + 32>18 # df + 12, and z is the critical z score. Use this approximation to find the critical t score for Exercise 11 “Platelets,” using a significance level of 0.05. Compare the result to the critical t value shown in the Statdisk display. Does this approximation appear to work reasonably well?

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