Confidence Intervals I. Interval estimation.
hand, but the Wilson confidence interval (which may be the best, along with Jeffreys) is ... Since n is large, a normal approximation is appropriate. α = .05 and α/2 = .025, so the critical value for Z is 1.96 (since F(1.96) = 1 - α/2 = .975). Using the formula for the approximate binomial confidence interval, we get .304 p .496
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