*15. For a sample of her 10 students, an instructor correlates \test anxiety" (X) with \percent correct" (Y) on the recent midterm. The data are as follows:

Student A B C D E F G H I J Percent correct 73 92 55 84 64 88 69 96 59 77 Test anxiety 35 26 48 21 10 30 42 25 4 16