A 1950s study showed that male graduates of Ivy League schoo

A 1950s study showed that male graduates of Ivy League schools (e.g., Harvard, Yale, Princeton) were more successful in their professional careers, as measured by annual earnings, than those who graduated from other colleges and universities. For the folowing statistical associations, Identify a extraneous variable(antecedent) and explain how it could create a spurious association

Solution

By an extraneous Variables we mean an undesirable variable which influence the relationship between the variables that a researcher is examining.

The extraneous variable is annual earnings.

Because professionally successful does not mean that one should earn much money during his/her career.