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We would like to construct a 99% confidence interval for the mean, based on a sample of 50 observations. The sample standard deviation is 5.5

We would like to construct a 99% confidence interval for the mean, based on a sample of 50 observations. The sample standard deviation is 5.5 and the sample mean is 21. The population standard deviation is 6.3Calculate the lower confidence limit. Round your answer to 3 decimals if needed. highlight the anawer

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