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QUESTION
The length of needles produced by a machine has standard deviation of 0.03 inches. Assuming that the distribution is normal, how large a sample is...
The length of needles produced by a machine has standard deviation of 0.03 inches. Assuming that the
distribution is normal, how large a sample is needed to determine with a precision of ±0.006 inches the
mean length of the produced needles to 99% confidence?
