K Assume the average selling price for houses in a certain county is $337,000 with a standard deviation of $29,000. a) Determine the coefficient of variation. b) Caculate the z-score for a house that sells for $356,000. c) Using the Empirical Rule, determine the range of prices that includes 99.7% of the homes around the mean. d) Using Chebychev's Theorem, determine the range of prices that includes at least 82% of the homes around the mean. a) Determine the coefficient of variation. CV=% (Round to one decimal place as needed.)