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Use the following information to answer the next five exercises. 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

Sagot :

Considering that we have the standard deviation for the sample, the t-distribution should be used to solve this question.

When should the z-distribution and the t-distribution be used?

  • If we have the standard deviation for the sample, the t-distribution should be used.
  • If we have the standard deviation for the population, the z-distribution should be used.

In this problem, there is a sample standard deviation of 0.5 hours, hence the t-distribution should be used.

More can be learned about the t-distribution at https://brainly.com/question/13873630

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