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dipetkov
  • Member for 3 years, 9 months
  • Last seen this week
  • Berlin, Germany ʅʕ•ᴥ•ʔʃ
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About

A Bulgarian in Berlin. Learning French and statistics. https://pronoun.is/she

I love stories. I think that's why I like statistics — it's storytelling with data.

My favorite story is The Worst Journey in the World about a bunch of men totally in over their heads who nevertheless face their unpreparedness and ill planning with courage and perseverance.










I've written this note for myself to summarise my doubts about anonymous voting as a measure of value.

This is a rant but a private one. I've come to realize that SE works as designed but may not be the place for me. So here are exhibits A and B to illustrate my confusion how (up votes - down votes) measures value.

A. How did the “Hat Matrix” get its name

I already knew why "hat" is called that so it took me 1 min to find a duplicate thread and point it out to the OP who elaborated that he was also interested in the term's origin. It took me 2 more minutes to find a reference to the paper explaining who introduced the term. (I like history, so I already knew where to look.)

End result: A question that has been half-way answered multiple times has (as of Nov 17, 2022) 13 upvotes. It has two nearly identical answers (which were posted at the same time; sometimes it happens that multiple users answer at about the same time.) It took me 3 min to write my answer for which I got 17 upvotes.

Total value: 46 votes.

B. If the model is not significant when two predictors are entered together, ...

This question takes a bit of reading between the lines & I couldn't understand how the numbers cited make sense. So I asked the OP to clarify and in comments she provided lots of relevant info, incl. a reference to the paper that reported those numbers and inspired her to ask the question in the first place. I read the paper, had the suspicion that a couple of numbers were entered incorrectly and wrote to the first author to ask about it. The professor replied and confirmed, yes, there was a typo. Inconsistency resolved!

End result: Three people (the OP, me & the author of the study) collaborated to find the correct answer and, in my opinion, this thread contains a useful lesson about R2 in multiple regression. As of Nov 7, 2022 the question has 4 upvotes, another answer — that is correct in general but doesn't address the question in particular — has 2 upvotes, and my answer has 1 votes.

Total value: 7 votes.

Does these values make sense? I don't think so. Did I learn something from answering? Yes, B was fun. I wish there was a filter to find questions of type B. They are rare.

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