Suppose that a researcher wants to see which gender is most helpful, men or women. The researcher parks a car with a flat tire on a road and tallies the number of men and women who stop to help. What would be an example of one confounding variable in this study?
a. The men are more likely than women to be familiar with fixing a flat tire.
b. The gender of the participants cannot be accurately determined.
c. The operational definition of helping has not been specified with precision.
d. The results probably depend upon the amount of traffic that passes by.
A
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