The formula used to construct a 95% confidence interval for the mean $\mu$ of a normal population when the value of the standard deviation $\sigma$ is known is given by __________.

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The Answer of The formula used to construct a 95% confidence interval for the mean $\mu$ of a normal population when the value of the standard deviation $\sigma$ is known is given by __________.

The Formula Used to Construct a 95% Confidence Interval for the Mean