News for hackers. Stuff that matters.

A comment on Increasingly Competitive College Admissions: Much More Than You Wanted to Know. Parent comment

Re:Increasingly Competitive College Admissions: Much More Th... by jsweojtj on Wednesday April 17, 2019 @01:01PM (#19684326)
And a correlation of 0%
[ Parent | on HN ]
Re:Increasingly Competitive College Admissions: Much More Th... by Jesus_Jones on Thursday April 18, 2019 @06:55PM (#19695511)
Right, 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.
[ Parent | on HN ]
Re:Increasingly Competitive College Admissions: Much More Th... by chongli on Friday April 19, 2019 @10:50AM (#19700072)
Correlation 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_...

[ Parent | on HN ]