calculating areas in both tails for a confidence interval

timer Asked: Nov 2nd, 2015

Question description

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 70 patients. The sample mean was 1.5 hours with a sample standard deviation of 0.5 hours.

actual question: Which distribution should you use for this problem? (Enter your answer in the form z or tdf where df is the degrees of freedom.)

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