A population has standard deviation =σ17.2 .Part 1 of 2 (a) How large a sample must be drawn so that a 99.9%confidence interval for μ will have a margin of error equal to 4.8? Round the critical value to no less than three decimal places. Round the sample size up to the nearest integer.   A sample size of ___ is needed to be drawn in order to obtain a  99.9% confidence interval with a margin of error equal to  4.8

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