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Young's modulus is a quantitative measure of stiffness of an elastic material. Suppose that for metal sheets of a particular type, its mean value and

Young's modulus is a quantitative measure of stiffness of an elastic material. Suppose that for metal sheets of a particular type, its mean value and standard deviation are90GPaand1.9GPa,respectively. Suppose the distribution is normal. (Round your answers to four decimal places.)

(a)

CalculateP(89X91)

whenn=16.

(b)

How likely is it that the sample mean diameter exceeds91whenn=36?

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