You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 68.2. You would like to be 90% confident that...

Extracted text: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 68.2. You would like to be 90% confident that your estimate is within 10 of the true population mean. How large of a sample size is required? Hint: Video [+] n = Submit Question