""What? I can't hear--" "What? I said, are you sure--" "CAN YOU PLEASE SPEAK--""
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Here is the correct causal relationship: "The louder you scream at the professor when handing in your stats exam, the better your grade will be." Everyone knows this.
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That's a problem we encounter in grad school. I studied forestry, so if you collect all your seeds from the same tree your samples aren't independent.
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If you're testing for a correlation in the general population, using the same three people over and over again in the sample is not valid. But if you're testing for a correlation among these three people, then this is valid, and I'm convinced that the conclusion is correct.
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(Although assuming all the tests were done in a limited time period, I'd be cautious about extrapolating this conclusion into the future or past.)
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Stats dept. press release: Possible correlation between screaming and test performance (not yet published) Supposedly serious science journalist: New study proves screaming improves cognitive ability Internet: Professors don't want you to know this one trick!
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Hashtag cursed images
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`try yelling into the mic a few more times` (ツ)
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An old statistician will come out of the cupboard and talk about repeated measures, fit sht <- aov(grade ~ scream + Error(student), xkcd) and tell the researchers that the slope is still not significant.
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