Fifteen people will be enrolled in a fourweek foreign langua

Fifteen people will be enrolled in a four-week foreign language course. On the first day, the instructor gives the students an exam to determine how much they already know. At the end of the four weeks, the instructor gives the students the same exam again. From the exam scores, the instructor wants to determine if taking the course has significantly increased the students

Solution

It represents the case of paired t tests.

This is because the instructor will cosider the pair of scores of the 2 exams for each student and will exmaine whether the 2nd score is statistically significantly higher than the 1st score or not.

Answer:

D. Case IV. Use paired t test