Mathematics, 11.12.2019 00:31 dianactorres
If the standard deviation of shear strength measurements for spot welds is 10.5 pounds per square inch (psi), what is the minimum number of test welds that should be sampled if we want the sample mean to be within 0.9 psi of the true mean with probability approximately 0.99? (round your answer up to the nearest whole number.)
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