5.65. To use the large-sample confidence interval for tt, you need at least 15 outcomes of each type. Show that the smallest value of n for which the method can be used is

(a) 30 when tt = 0.50,

(b) 50 when tt = 0.30,

(c) 150 when tt = 0.10. That is, the overall n must increase as tt moves toward 0 or 1.

(When the true proportion is near 0 or 1, the sampling distribution can be highly skewed unless n is quite large.)

Select the best response in Exercises 5.66-5.69.