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:

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.
A computer and statistical software will be desirable and useful. However, any necessary calculations can also be done with the aid of a pocket calculator. For readers using statistical software, keep in mind the file-naming key€” for example, the data for Exercise 3.57 will be in data file XR03057.
In exercise

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0.00% 0.04 0.05 0.00 0.03 0.08% 0.00 0.21 0.09 0.00 0.15% 0.03 0.01 0.05 0.16 0.18% 0.11 0.10 0.03 0.04 0.02% 0.17 0.19 0.00 0.10 2.20 195 2.15 2.08 85 92 2.23 2.19 98 2.07 2.24 2.31 196 2.30 2.27 .89