Do one of the following, as appropriate : Find the critical value if apply. 90%, n=9; O = 4.2; population appears to be very skewed, a. Z a/2 = 2.306 b. Z a/2 = 2.896 c. t a/2 = 2.365 d. Neither the normal

Do one of the following, as appropriate : Find the critical value if apply. 90%, n=9; O = 4.2; population appears to be very skewed, a. Z a/2 = 2.306 b. Z a/2 = 2.896 c. t a/2 = 2.365 d. Neither the normal nor the t distribution applies.

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