Hi professor
Certainly, there is a different between the results of makeup exam and regular exam that different is about 14 point of Regular exam over the Makeup exam. However, as you can see in the table 16 there are three factor that can explain logically why it happens, which are date and hour , number of student , temperature of classroom.
First of all is date, the regular exam was administered on Wednesday and the makeup exam on Friday. As student I can say that we have many responsibilities such as homework and exams every week. It could be really stressful. Even although It does not sound good , the most common strategy is work in them in a chronology way. That means the study for the test on Friday was maybe done Friday during the day. While the Wednesday test was study maybe on previous weekend.
Second is the number of the student, I think that could be the mainly reason . You can notice that on makeup exam only was applied to 25 students. While, the regular exam was applied to 125 students. That means that one or two bad grades can affect highly the average on makeup test.
Finally, The temperature in the classroom on Friday it was so hot arround 28 C. The students was complaining all the time about it , but I could not do anything to solve it .
I think that different between the average on the two test is more that supported on these factors.
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