Question: Let X be a random variable with normal a distribution having u=30.9 and 02=8.41. A random sample of 15 items was taken. Calculate (a) Pr

Let X be a random variable with normal a distribution having

Let X be a random variable with normal a distribution having u=30.9 and 02=8.41. A random sample of 15 items was taken. Calculate (a) Pr ( -2.5

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