?If X is a normal random variable with mean 40 and standard deviation 10 and P(X < 38) = 0.4207, then P(X ? 38) = _________ .
Chapter 7, Problem 4(choose chapter or problem)
If X is a normal random variable with mean 40 and standard deviation 10 and P(X < 38) = 0.4207, then P(X ≤ 38) = _________ .
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