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Confidence Intervals and Sample Size

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Independent measurements of a certain distance are identically distributed random variables with mean 20 and variance 3.5 ; how many measurements are necessary to ensure that the average of the measurements is accurate to within .2 of the mean with 97% accuracy.

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Sample size to achieve the desired accuracy has been determined in the solution.

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Independent measurements of a certain distance are identically distributed random variables with mean 20 and ...

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