Q2 (a) The Manager would like to know the precision of the cutting machine they had. The measurement is assumed to be normally distributed with
Q2 (a) The Manager would like to know the precision of the cutting machine they had. The measurement is assumed to be normally distributed with standard deviation 2 mm. How large the sample that need to be taken if he want to be 98% of finding whether the estimated mean differ from the true mean by 0.5 mm
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