Question: Suppose you wish to estimate a population mean ~ based on a sample of n observations. What sample size is required if you want your

Suppose you wish to estimate a population mean ~ based on a sample of n observations. What sample size is required if you want your estimate to be within 2 standard deviations of " with probability equal to 0.95, if you know the population standard deviation is 12? a. 239 b. 196 139 d. 98

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