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I am stuck on the Chebychev's Theorem ... Please explain HOW to calculate what Z so that I can calculate the upper bound and lower bound is in plain language

Assume the average selling price for houses in a certain county is $364,000 with a standard deviation of S35,000 a) Determine the coefficient of variation. b) Caculate the z-score for a house that sells for $388,000. c) Using the Empirical Rule, determine the range of prices that includes 68% of the homes around the mean. d) Using Chebychevs Theorem, determine the range of prices that includes at least 96% of the homes around the mean. a) Determine the coefficient of variation. CV-9.6 % (Round to one decimal place as needed.) b) Calculate the z-score for a house that sells for $388,000. 69 (Round to two decimal places as needed) c) Using the Empirical Rule, determine the range of prices that includes 68% of the homes around the mean upper bound x399000 lower bound x $ 329,000 (Round to the nearest dollar as needed.) d) Using Chebychevs Theorem, determine the range of prices that includes at least 96% of the homes around the mean. upper bound x-$ lower bound x $ Round to the nearest dollar as needed.)

math   Statistics-And-Probability   
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rage Sellin ttere ure neod the homes arvumd 42 096 a)7 어,ph kouer board 109,000 .

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