The random variable, X has a normal distribution with a mean of 11 and a variance of 9 ...

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The random variable, X has a normal distribution with a mean of 11 and a variance of 9.

a) Determine the value of y such that P(X < y) = .2810

b) Determine the value of z such that P( 11-z < X <11+z ) = .8

    • 8 years ago
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    μ = 11, σ = 9 (a) P(x < y) = 0.2810 ...
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