Carlos,the president of a fraternity on campus,randomly sampled 500 students,asked them if they belonged to a fraternity or sorority,and asked them about their current GPA.He discovered that the GPAs of those people in fraternities and sororities are higher than those of people who are not involved in the Greek system.Gleefully,he presented his findings to the Dean,saying that being involved in a fraternity or sorority leads to higher grades.What rule of research methods is Carlos breaking?

Question

Quizplus · Accepted Answer

Carlos is making the mistake of assuming that correlation between being in a fraternity/sorority and higher GPAs implies causation. However, there could be other factors at play that contribute to the higher GPAs, such as self-selection bias, peer pressure, or access to academic resources.

Carlos,the President of a Fraternity on Campus,randomly Sampled 500 Students,asked