If a confidence level of 90% is used to construct a confidence interval for the mean $\mu$ of a normal population when the value of the standard deviation $\sigma$ is known, the z critical value is __________.

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The Answer of If a confidence level of 90% is used to construct a confidence interval for the mean $\mu$ of a normal population when the value of the standard deviation $\sigma$ is known, the z critical value is __________.

If a Confidence Level of 90% Is Used to Construct μ\muμ

If a Confidence Level of 90% Is Used to Construct $\mu$