If you want to be 99 confident of estimating the population


If you want to be 99?% confident of estimating the population mean to within a sampling error of (plus or minus) ±30 and the standard deviation is assumed to be 150?, what sample size is? required? (Use table of values for the standardized normal distribution.) Round up to the nearest integer.

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Business Economics: If you want to be 99 confident of estimating the population
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