7th Edition

ISBN: 9780840057655

Author: WEIERS

Publisher: VST

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Textbook Question

Chapter 3, Problem 3.60CE

A law enforcement agency, administering breathalyzer tests to a sample of drivers stopped at a New Year’s Eve roadblock, measured the following blood alcohol levels for the 25 drivers who were stopped:

0.00% 0.08% 0.15% 0.18% 0.02%
0.04 0.00 0.03 0.11 0.17
0.05 0.21 0.01 0.10 0.19
0.00 0.09 0.05 0.03 0.00
0.03 0.00 0.16 0.04 0.10
a. Calculate the mean and standard deviation for this sample.

b. Use Chebyshev’s theorem to determine the minimum percentage of observations that should fall within k = 1.50 standard deviation units of the mean. Do the sample results support the theorem?

c. Calculate the coefficient of variation for these data.

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Chapter 3, Problem 3.59CE

Chapter 3, Problem 3.61CE

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Chapter 3 Solutions

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Solution Summary: The author explains the formula used to calculate the mean and standard deviation of the given sample data.

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