If you want to be 95% confident of estimating the population mean to within a sampling error of ± 15 and the standard deviation is assumed to be 75, what sample size is required? Click the icon to...

Extracted text: If you want to be 95% confident of estimating the population mean to within a sampling error of ± 15 and the standard deviation is assumed to be 75, 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.)