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QUESTION
A study 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 sala
A study 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 paradox
B.observational study
C.experimental study
D.cause-and effect realtionship
E.error by the statistician
