Assume the average age of an MBA student is 30.2 years old with a standard deviation of 2.7 years. a) Determine the coefficient of variation. b) Calculate the z-score for an MBA student who is 27 years old. c) Using the empirical rule, determine the range of ages that will include 68% of the students around the mean. d) Using Chebyshev's Theorem, determine the range of ages that will include at least 91% of the students around the mea e) Using Chebyshev's Theorem, determine the range of ages that will include at least 83% of the students around the mea a) The coefficient of variation is% (Round to one decimal place as needed.) fiew an example Get more help . Clear all