# The mean and the standard deviation of the sample of 100 bank customer waiting times are

## Question:

We give the mean and the standard deviation of a sample that has been randomly selected from a population. For each exercise, find estimated tolerance intervals that contain approximately 68.26 percent, 95.44 percent, and 99.73 percent of the individual population measurements. Also, find a 95 percent confidence interval for the population mean. Interpret the estimated tolerance intervals and the confidence interval in the context of the situation related to the exercise.

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**Related Book For**

## Business Statistics In Practice

**ISBN:** 9780073401836

6th Edition

**Authors:** Bruce Bowerman, Richard O'Connell