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 70 GPa and 2.4 GPa, respectively. Suppose the distribution is normal. (Round your answers to four decimal places.) n USE SALT (a) Calculate P(69 sXS 71) when n = 25. (b) How likely is it that the sample mean diameter exceeds 71 when n = 49?

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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 standard deviation are 70 GPa and 2.4 GPa,
respectively. Suppose the distribution is normal. (Round your answers to four decimal places.)
n USE SALT
(a) Calculate P(69 < XS 71) when n = 25.
(b) How likely is it that the sample mean diameter exceeds 71 when n = 49?
Transcribed Image Text: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 70 GPa and 2.4 GPa, respectively. Suppose the distribution is normal. (Round your answers to four decimal places.) n USE SALT (a) Calculate P(69 < XS 71) when n = 25. (b) How likely is it that the sample mean diameter exceeds 71 when n = 49?
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