(Answered) Question 1 if you want to be 95 confident of estimating the

Statistics

Question: 1. If you want to be 95% confident of estimating the population mean to within a sampling error of ±5 and the standard deviation is assumed to be ±15, what sample size is required?

2. 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 100, what sample size is required?

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