The following data gives the number of hours 7 students spent studying and their corresponding grades on their midterm exams. Hours Spent Studying 0 0.5 1.5 2.5 4 4.5 5.5 Midterm Grades 60 63 72 78 81 93 96 Step 2 of 3 : Determine if r is statistically significant at the 0.01 level.