Tag: Correlation

[YouTube] Breaking down Intuitively the Concept of Standard Deviation

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SIMPLIFIED TUTORIAL, 1 (in the series where we break down concepts intuitively):
Before we talk about correlation, let’s discuss standard deviation, its analog in dimension 1. People don’t get while using it as a metric for deviation!

See the whole book (gets technical beyond Chapter 5)

Link to the Book: Statistical Consequences of Fat Tails: Real World Preasymptotics, Epistemology, and Applications

[YouTube] Correlation measures are misused in the presence of nonlinearities

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A VERY SIMPLIFIED TUTORIAL (VERY SHORT)
Correlation measures are misused in the presence of nonlinearities.

(How a measure of unintelligence can give the illusion of high correlation with performance.)

Correlation measures are not supposed to be used in the presence of nonlinearities. When 2 variables correlate half the time (in a symmetric way around the mean), correlation will not be 50% but will show ~90%. Part of debunking IQ studies. If IQ works for disabilities but does not correlate with success, there is an illusion of correlation because of the biases in the metric.