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Chapter 8: Q.42 (page 479)

Explain in complete sentences what the confidence interval means.

Short Answer

Expert verified

A confidence interval is a kind of interval estimate of a population parameter

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 was 1.5hours with a sample standard deviation of0.5 hours.

02

Explanation

A confidence interval is a kind of interval estimate of a population parameter. It can be interpreted as, with 95% confidence it can be expressed that the population means time spent waiting is between 1.38 hours to1.62 hours.

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