Suppose you take a random sample from a population known to be normally distributed, but the value of σ is unknown. Your sample size is n =15. Which formula below should be used to find the 95% confidence interval for the mean?

Question

Suppose you take a random sample from a population known to be normally distributed, but the value of σ is unknown. Your sample size is n =15. Which formula below should be used to find the 95% confidence interval for the mean? ​

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The Answer of Suppose you take a random sample from a population known to be normally distributed, but the value of σ is unknown. Your sample size is n =15. Which formula below should be used to find the 95% confidence interval for the mean? ​

Suppose You Take a Random Sample from a Population Known