The tensile strength (1,000 psi) of a new composite can be modeled as a normal distribution. A

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The tensile strength (1,000 psi) of a new composite can be modeled as a normal distribution. A random sample of size 25 specimens has mean \(\bar{x}=45.3\) and standard deviation s=7.9. Does this information tend to support or refute the claim that the mean of the population is 40.5 ?

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Probability And Statistics For Engineers

ISBN: 9780134435688

9th Global Edition

Authors: Richard Johnson, Irwin Miller, John Freund

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