Housing Prices on Zillow The Web site zillow.com allows us to research real estate
Chapter 15, Problem 10(choose chapter or problem)
Housing Prices on Zillow The Web site zillow.com allows us to research real estate listings. One neat feature of the site is the Zestimate, which represents the price Zillow believes the property should sell for. If the Zestimate is accurate, the median difference between the actual selling price and the Zestimate should be zero. The following data represent the difference between the actual selling price and Zestimate for a random sample of 10 real estate transactions. Do the data suggest the Zestimate is inaccurate? Use the a = 0.05 level of significance. Note: A normal probability plot indicates the data are not normal. 2500 -500 -79,500 -13,500 -500 -1000 14,500 3,500 -12,500 -6000 Source: zillow.com
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