Find x1 such that pxgtx1 06 consider an interval for x

Assignment Help Basic Statistics

Assume X is normally distributed with a mean of 12 and a variance of 16.

a) Calculate P(9<X<17)

b) Find x1 such that P(X>x1) = 0.6

c) Consider an interval for X, (a<X<b). Calculate a and b such that the interval is shortest and P(a<X<b) = 0.3

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