aluating the Test grades for a stats course, a professor was concerned that the performance of the students left a lot to be desired. So, he carried out an intensive review with the students and administered the test to them again. The results before and after the review are given below. BFR 45 76 68 32 82 60 55 72 58 AFR 58 78 80 48 78 65 50 78 66 Test at the 1% level to see whether the intensive review improved the performance of the students. NOTE: This information will be used for this and the next 5 questions. Please, take down intermediate results. Take the before samples as sample labeled "1", the appropriate alternative among these is Question 1 options: Middle-tailed Two-tailed Left-tailed