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If you want to be 99% confident of estimating the population mean to within a sampling error of 20 and the standard deviation is
If you want to be 99% confident of estimating the population mean to within a sampling error of 20 and the standard deviation is assumed to be 80, what sample size is required? Click the icon to view a table of values for the standardized normal distribution. The sample size required is (Round up to the nearest integer.) *
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Calculus
Authors: Dale Varberg, Edwin J. Purcell, Steven E. Rigdon
9th edition
131429248, 978-0131429246
