For large n, if X ~ B(n;0.5), then
Hence to attain P(X ~ r) =a/2 we use (r + 0.5 - n/2)/rn./2 =
-Za/2 or r = [n/2 - 0.5 - (rn./2)za/2 ], where [ ] represents the
greatest integer function. Use this fact to write a program to
obtain an approximate 90, 95, 98, or 99% confidence interval for
n in the large sample case. The value of 1 - ex and n should be
input. The observations should appear in DATA statements.
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