Question

Mr. Doe wanted to perform an experiment to determine if doing a class review before a test would increase test scores. Mr. Doe normally does not review. To perform this experiment, Mr. Doe reviewed material with the 2nd period before a test and did not review with the 3rd period. After grading papers, he found that the 2nd period had an average grade of 93, and the 3rd period had an average grade of 72. He determined that reviewing before a test might increase test scores.

a) Control group: 3rd period; Experimental group: 2nd period
b) Control group: 2nd period; Experimental group: 3rd period
c) Control group: 2nd period; Experimental group: None (no review)
d) Control group: 3rd period; Experimental group: None (no review)

Answer 1

The experiment conducted by Mr. Doe compares the effect of reviewing material before a test on test scores. The control group is the 3rd period and the experimental group is the 2nd period. Reviewing before the test is predicted to increase test scores based on the results.

Step-by-step explanation:

The experiment conducted by Mr. Doe is an example of an experimental study design. In this study, the control group is the 3rd period, where the material was not reviewed before the test. The experimental group is the 2nd period, where the material was reviewed before the test.

Based on the average grades of the 2nd and 3rd period, it can be predicted that a student who scored a 90 on the third exam would likely perform better on the final exam if the same pattern holds.

The primary topic of this question is Experimental Design.