How Zestimate Works
Accuracy is an issue with Zestimates… I happened to find this article, which explains the processes used to generate Zillow’s Zestimate, the estimate of residential property value: Inside the Zestimate: Data Science at Zillow I found it interesting that they use the ‘R’ spreadsheet for doing some number-crunching, not Excel. ‘R’ is what George Dell has been demonstrating in his classes. But the graphs are generated by a different software. Accuracy is an issue with Zestimates, according to Zillow, per the article: “Nationally, the median error rate is 8.3 percent, the company says.” However, they don’t define what ‘error rate’ means. Is...