Mathematics, 11.10.2019 20:20 kennethDA19

Astudy revealed a strong, linear, positive association between years of education and salary for educators. another study revealed a strong, linear, positive association between years of education and salary for business people. when the data were combined, the association became negative.

what is this an example of?

observational study
experimental study
cause-and-effect relationship
error by the statistician
simpson's paradox

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Astudy revealed a strong, linear, positive association between years of education and salary for edu...