Spring 2018 Stat 3309 ONLINE SHENTA BURRELL | 2/17/18 7:58 PM Silicon com Silico

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Spring 2018 Stat 3309 ONLINE SHENTA BURRELL | 2/17/18 7:58 PM Silicon com Silicon For Ap Test: Exam 1 Time Remaining: 01:47:30 Submit Test Pattern F This Question: 1 pt 90f 15 (0 complete) This Test: 15 pts possi com er Case Retro Ha Assume the average selling price for houses in a certain county is $371,000 with a standard deviation of $35,000. om a) Determine the coefficient of variation. b) Caculate the z-score for a house that sells for $404,000. cusing the Empical Rule, determine the range of prices that includes 68% ofthe hones around themea etro Ha ck For i 28.indd d Using Chebychev's Theorem, determine therange of poes that includes at least 87% of the homes around the mean. m a) Determine the coefficient of variation. EN I Fo Round to one decimal place as needed.) YLE D b) Calculate the z-score for a house that sells for $404,000. -U (Round to two decimal places as needed.) Using the Empirical Rule, determine the range of prices that includes 68% of the homes around the mean OD Di c) ction 0D Enter your answer in each of the answer boxes. tion Sample Tests and Quizzes Black

Explanation / Answer

1) a)
Coefficient of variation = sd /mean = 35000/371000 = 0.0943396
b)
z = (X - mean)/sd
= (404000 - 371000)/35000 = 0.942857

c)
68 % lies in 1 sd within mean
(371000 - 35000 , 371000 +35000)
= (336000,406000)

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