How many nickels does he need to weigh

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Reference no: EM13205492

A previous study of nickels showed that the the standard deviation of the weight of nickels is 250 milligrams. A coin counter manufacturer wishes to find the 95% confidence interval for the average weight of a nickel. How many nickels does he need to weigh to be accurate within 25 milligrams?

Reference no: EM13205492

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