A study compared colleges that tested for drugs with colleges that did not, finding similar levels of students using drugs in each. State a potential lurking variable that could affect the results of a study.
What is a potential lurking variable?
A) The students may not have responded honestly.
B) Not all colleges that tested for drugs may have done so with the same reliability.
C) The colleges that tested for drugs may have formerly had higher rates of students using drugs.
D) There is not potential lurking variable. The study proves that colleges that tested for drugs accomplished nothing.