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But a coin flip on a large number of people would trend toward 50% predictions over time.
by Jesus_Jones 7y ago
But a coin flip on a large number of people would trend toward 50% predictions over time.
- mont 7y agoWhich is worse than 56%
- Jesus_Jones 7y agoYeah, but if randomness gets you 50, 56 doesn't feel that useful.
- jsweojtj 7y agoAnd a correlation of 0%
- Jesus_Jones 7y agoRight, but I'm trying to get at 56% isn't great cause random is 50, and there's no clarify on correlation of the measure that gets to 56.
- chongli 7y agoCorrelation is not probability. You can't compare them at all. Flipping a coin for each student would produce a correlation of 0, far lower than the correlation of 0.56 cited above. Have a look at some plots of data [1] with different correlation coefficients to see how dramatic it can be. Note the difference between r = 0.00 and r = 0.60. That's about what we're dealing with here. [1] http://www.bwgriffin.com/gsu/courses/edur7130/images/twelve_scatterplots.jpg http://www.bwgriffin.com/gsu/courses/edur7130/images/twelve_...