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Chapter 8: Q.40 (page 479)

Which distribution should you use for this problem?

Short Answer

Expert verified

The distribution ist70-1=t69

Step by step solution

01

Given information

Given in the question that, 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 surveyed70patients. The sample mean was1.5hours with a sample standard deviation of0.5 hours.

02

Explanation

The distribution required for this problem is tdistribution with parameters tn-1.

Here, the number of patients surveyed is 70.

Therefore,

tn鈭�1

where, n=70

So,

t70-1=t69

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Most popular questions from this chapter

Of 1,050randomly selected adults, 360identified themselves as manual laborers, 280identified themselves as non-manual wage earners, 250identified themselves as midlevel managers, and 160identified themselves as executives. In the survey, 82%of manual laborers preferred trucks, 62%of non-manual wage earners preferred trucks, 54%of mid-level managers preferred trucks, and 26%of executives preferred trucks

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