While standardized admissions tests have changed several times over the past 50 years, the things they’re good at — sorting students by income, ethnicity, and parental attainment — have not, says John Boeckenstedt.https://chroni.cl/2SCPwsm
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Would you say IQ of 140 is twice that of 70?
No, it's an ordinal scale, not an internal or ratio scale.
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I asked the other guy, Geoff
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Right-Ten people with IQs of 70 could not match the productivity of 5 with IQs of 140. Just like there is no number of people with my basketball skills would make a trade for Michael Jordan a fair one.
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Or, ordinal variables have no true meaning of zero and the differences between intervals are quantitatively meaningless. Which begs the question, why are parametric tests done on ordinal variables?
End of conversation
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