Mathematics, 12.09.2019 23:30, LJ710

Astudy revealed a strong, linear, negative association between a decrease in salary and amount spent on clothes. another study revealed a strong, linear, negative association between decrease in salary and amount spent on food. when the data were combined, the association became positive. what is this an example of?
a. simpson's paradoxb. observational studyc. experimental studyd. cause-and effect realtionshipe. error by the statistician

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Astudy revealed a strong, linear, negative association between a decrease in salary and amount spent...