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SAT, 22.12.2021 03:50 isaiahjohnson2594

The breaking strength of a rivet has a mean value of 10000 psi and a standard deviation of 500 psi. A. What is the probability that the sample mean breaking strength for a random sample of 40 rivets is between 9950 and 10250? b. If the sample size had been 4 rather than 40, could the probability requested in part (a) be calculated from the given information? why?.

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