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03-01-2023
Mathematics

Answered

A hospital would like to determine the mean length of stay for its patients having abdominal surgery. a sample of 21 patients revealed a sample mean of 5.7 days and a sample standard deviation of 1.1 days. assume that the lengths of stay are approximately normally distributed. find a 90% confidence interval for the mean length of stay for patients with abdominal surgery. round the endpoints to two decimal places, if necessary.

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