Calculate the upper bound for a 95 confidence interval about where is known to be 3 and x x 12 and sample size is n 120 (Answer to 3 decimal places)

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Calculate the upper bound for a 95% confidence interval about where is known to be 3 and x x

Calculate the upper bound for a 95% confidence interval about $μ$ where $σ$ is known to be 3 and $\bar{x}$ = 12 and sample size is n = 120. (Answer to 3 decimal places)

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