Teacher A wants to know if an AP Statistics Review helps students on the AP Exam. She takes a random sample of 10 students and has each student take a practice exam before the review. Then, after sitting through the review, the same students take another practice exam and the scores are compared. Is there statistical evidence, at the 5% level, that the review improved the student scores?

Before After 48 55 45 59 62 72 54 53 61 64 75 83 67 72 51 63 70 80 65 65