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Top Best Search Popularity Rating Error Estimations

Standard Deviation

Standard deviation, given in the top best search popularity ratings results, is a regular statistics value. It is the measure of the natural statistical error. Statistical error greater than two standard deviations is highly improbable.

Other Errors

Actual error in the popularity estimation may be higher than the standard deviation. There are many ambiguities. For example, when people search for the desktop, is it desktop computer or MS Windows "desktop" on the computer screen? We tried our best to avoid such ambiguities, but it is difficult to estimate the real error. We, however, believe that at least qualitatively the results are correct because different methods that we tried gave qualitatively similar result.
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