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If you want to be 95% confident of estimating the population mean to within a sampling error of + 25 and the standard deviation is

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If you want to be 95% confident of estimating the population mean to within a sampling error of + 25 and the standard deviation is assumed to be 125, what sample size is required? E 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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