The duration customer service calls to an insurance company is normally distributed, with mean 20 minutes, and
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The duration customer service calls to an insurance company is normally distributed, with mean 20 minutes, and standard deviation 5 minutes. For the following sample sizes, construct a 95% confidence interval for the population mean duration of customer service calls.
a. n = 25
b. n = 100
c. n = 400
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Discovering Knowledge In Data An Introduction To Data Mining
ISBN: 9780470908747
2nd Edition
Authors: Daniel T. Larose, Chantal D. Larose
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