Predictive Analytics - E-bok - Conrad Carlberg () | Bokus
But as I mentioned in the prior section, Amazon does publish sales rankings. For the project described here, I decided that I could live with the sales rankings as an indicator of sales figures. Sometimes several hours pass without any update occurring.
But I found that most of the time the updates take place hourly—give or take a couple of minutes—and correspond either to no sales the rankings get larger or to a presumed sale the rankings get smaller, often by a generous amount. I decided that I could live with changes in rankings as a stand-in for actual sales.
I also decided that I could make an assumption about an increase in ranking, such as from 25, to 20, Amazon sells four or five copies of one of my books each day. Description Excel predictive analytics for serious data crunchers!
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Predictive Analytics: Microsoft Excel 2016 (2nd Edition)
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