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.