5. : + 0001 6 points A hospital is trying to cut down on emergency room wait tim

Question

5. : + 0001 6 points 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. l Previous Answers llowskylrteoStat1·PR040. My Notes Ask Your Teacher Which distribution should you use for this problem? (Enter your answer in the form z or t where df is the degrees of freedom.) t: 169 What information is needed to describe the distribution completely?

Explanation / Answer

Given : n = 70  

Sample mean = 1.5

Sample standard deviation = 0.5

Here , the population standard deviation is unknown

Therefore , use t distribution

Therefore , degrees of freedom = n - 1 = 70 - 1 = 69

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