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.

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0.18% 0.00% 0.08% 0.15% 0.03 0.02% 0.00 0.04 0.05 0.11 0.17 0.21 0.01 0.05 0.10 0.03 0.19 0.09 0.00 0.03 0.00 0.00 0.16 0.04 0.10