Discussion:
Q. Use the below table that lists SAT scores before and after the random sample of 10 students took a preparatory course. Is there sufficient evidence to conclude that the preparatory course is effective in raising scores? Use a 0.05 significance level.
Student A B C D E F G H I J
SAT before course 700 840 830 860 840 690 830 1180 930 1070
SAT after course 720 840 820 900 870 700 800 1200 950 1080