How many automobiles should be used in the test

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Question: Mileage tests are conducted for a particular model of automobile. If a 98% confidence interval with a margin of error of I mile per gallon is desired, how many automobiles should be used in the test? Assume that preliminary mileage tests indicate the standard deviation is 2.6 miles per gallon.

Reference no: EM131456361

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How many automobiles should be used in the test : Mileage tests are conducted for a particular model of automobile. If a 98% confidence interval with a margin of error of I mile per gallon is desired.

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