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A hospital is trying to cut down on emergency room wait times. It is interested in the amount of time patients must wait before being
A hospital is trying to cut down on emergency room wait times. It is interested in the amount of time patients must wait before being called back to be examined. An investigation committee randomly surveyed 80 patients. The sample mean was 1.5 hours, with a sample standard deviation of 0.7 hours. The upper- bound 95% confidence interval is
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