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If all possible sample size of 16 are taken from a normal population with mean = 50, and standard deviation = 5. What is the

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Answer #1

Prob{(μxbar -1.9*σxbar) ≤ Xbar ≤ (μxbar -0.4*σxbar)} =
           = Prob{(-1.9) ≤ (Xbar-μxbar)/σxbar ≤ (-0.4)}
           = Prob{(-1.9) ≤ z ≤ (-0.4)}
           = 0.3159

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