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The patient recovery time from a particular surgical procedure is normally distributed with a mean of 20 days and a standard deviation of 4.31 days.Let

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 20 days and a standard deviation of 4.31 days.Let X -is the number of daysa randomly selected patient needs to recover from the surgical procedure.What is the lower bound of 90%confidence interval of X?

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