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 are 85 GPa and 2.4 GPa, respectively. Suppose the distribution is normal. (Round your answers to four decimal places.) A USE SALT (a) Calculate P(84 si S 86) when n = 9. (b) How likely is it that the sample mean diameter exceeds 86 when n = 25? You may need to use the appropriate table in the Appendix of Tables to answer this question. Need Help? Read It

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