Professor Todd decides to test her hypothesis that eating chocolate prior to exams increases students' test scores. She randomly assigns students to two groups at the beginning of the semester. One group receives a bar of chocolate before each test, while the other group receives another type of candy. She compares their scores at the end of the year, and finds that the students who ate the chocolate scored an average of ten points higher on their exams. What is a fair conclusion that can be drawn from this experiment?
A)Eating chocolate causes students' test scores to increase.
B)Eating chocolate has no relationship to students' test scores.
C)Eating chocolate may increase students' satisfaction with the class.
D)Eating chocolate makes students happy.

Question

Quizplus · Accepted Answer

The experiment shows a statistically significant difference in test scores between the group that ate chocolate before exams and the group that did not. This suggests that eating chocolate prior to exams has a causal relationship with higher test scores. However, it is important to note that this experiment only establishes a correlation between eating chocolate and increased test scores, and further research is needed to establish a causal relationship definitively.

Professor Todd Decides to Test Her Hypothesis That Eating Chocolate