A law enforcement agency, administering breathalyzer tests to a sample of drivers stopped at a New Years
Question:
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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