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An engineer wishes to determine the width of a particular electronic component. If she knows that the standard deviation is 2.4 mm, how many of

An engineer wishes to determine the width of a particular electronic component. If she knows that the standard deviation is 2.4 mm, how many of these components should she consider to be 80% sure of knowing the mean will be within 0.50.5 mm? Possible answers

218
7
38
17
24

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