Question: A population has standard deviation= 17.1 (a) How large a sample must be drawn so that a99.9% confidence interval for will have a margin of

A population has standard deviation= 17.1

(a) How large a sample must be drawn so that a99.9% confidence interval for will have a margin of error equal to 3.7?

Round the critical value to no less than three decimal places. Round the sample size up to the nearest integer.A sample size ofis needed to be drawn in order to obtain a99.9%confidence interval with a margin of error equal to3.7.

(b) If the required confidence level were95%, would the necessary sample size be larger or smaller?

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