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A random sample of size n=16 is take from a normal population with μ=40 and σ2=32....

A random sample of size n=16 is take from a normal population with μ=40 and σ2=32. Find the probability that the sample mean is greater than or equal to 38.

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Answer #1

                        

                         = P(Z > -1.41)

                         = 1 - P(Z < -1.41)

                         = 1 - 0.0793

                         = 0.9207

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