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Mathematics, 21.12.2019 03:31 fgcherubin
The yield stress of a random sample of 25 pieces of steel was measured, yielding a mean of 52,800 psi. and an estimated standard deviation of s = 4,600 psi. a. what is the probability that the population mean is less than 50,000 psi? b. what is the estimated fraction of pieces with yield strength less than 50,000 psi? c. is this sampling procedure sampling-by-attributes or sampling-by-variable?
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The yield stress of a random sample of 25 pieces of steel was measured, yielding a mean of 52,800 ps...
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