A chemistry instructor wants to find out whether having a practice test or allowing one note sheet will have a better effect on student performance on the actual exam. For their first test, they offer their students a practice test. For the second test, they do not offer a practice test, but instead allow a note sheet that students can use while taking the exam. They then compare student performance on the two exams. Which of the following correctly identifies the treatment of this experiment?(1 point)
Responses
whether a practice test is given or a note sheet is allowed
the number of students who complete the practice test versus the number of students who create a note sheet
the difference in student performance on the two exams
the size of the note sheet that is allowed in the second exam