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ABranco comments on Bayes' Theorem Illustrated (My Way) - Less Wrong

126 Post author: komponisto 03 June 2010 04:40AM

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Comment author: ABranco 03 June 2010 12:34:18PM 0 points [-]

I'm so happy: I've just got this one right, before looking at the answer. It's damn beautiful.

Thanks for sharing.

Comment author: pjeby 03 June 2010 02:37:18PM 1 point [-]

I'm so happy: I've just got this one right, before looking at the answer. It's damn beautiful.

Same here. It was a perfect test, as I've never seen the Tuesday Boy problem before. Took a little wrangling to get it all to come out in sane fractions, and I was staring at the final result going, "that can't be right", but sure enough, it was exactly right.

(Funny thing: my original intuition about the problem wasn't that far off. I was simply ignoring the part about Tuesday, and focusing on the prior probability that the other child was a boy. It gives a close, but not-quite-right answer.)