Brilliant jerks, crazy hotties, and other artifacts of range restriction (2019)

cant read this article without "upgrading". no i dont want to "upgrade". can we downrank Medium until they stop doing bullshit like this? (yes towardsdatascience is a well known data publication, would love to push them gently into moving off medium)

Re: Brilliant jerks, crazy hotties, and other artifacts of range restriction (2019)

#7

Post by jameshart » Sun, Nov 20, 2022, 3:37 AM UTC

There's an interesting geometric interpretation that this implies:

The specific scenario they're modeling here, where a bunch of samples with correlated properties x and y are clustered by x + y, essentially takes a strip of datapoints that are distributed over a diagonally-oriented rectangle, and then cuts it into a series of shorter strips, by cutting at thresholds (lines where x+y=n) that run along the opposite diagonal. If the resulting short strips are narrow enough (if the upper and lower thresholds are closer together than that degree to which x and y typically differ), they will be rectangles oriented the other way - in other words they will represent groups with strong negative correlation.

Re: Brilliant jerks, crazy hotties, and other artifacts of range restriction (2019)

#8

Post by gleb » Sun, Nov 20, 2022, 3:50 AM UTC

jameshart wrote: post #7

There's an interesting geometric interpretation that this implies: The specific scenario they're modeling here, where a bunch of samples with correlated properties x and y are clustered by x + y , essentially takes a strip of datapoints that are distributed over a diagonally-oriented rectangle, and then cuts it into a series of shorter strips, by cutting at thresholds (lines where x+y=n) that run along the opposite d…

Which is exactly how this (Berkson's paradox) is often visualized.

Re: Brilliant jerks, crazy hotties, and other artifacts of range restriction (2019)

#9

Post by DiggyJohnson » Sun, Nov 20, 2022, 3:57 AM UTC

runnerup wrote: post #5

dqpb wrote: post #4

Quoted post unavailable.

I wouldn’t know. I was a rower.

I’ve seen once heard of several concussions from rowing. Catch a crab and the oar comes back heaaavvy

Re: Brilliant jerks, crazy hotties, and other artifacts of range restriction (2019)

#10

Post by streptomycin » Sun, Nov 20, 2022, 3:57 AM UTC

An example I like is in basketball. A lot of tall players aren't good shooters. People wonder why, like are they launching the ball too high and messing up the angle? Are their hands too big to precisely control the ball? Are they lazy and not practicing? Seems more likely to be this same paradox - if you're short and can't shoot, you never make it to the NBA.