Grading using "The Curve" When grading using "the curve", the percentages are as follows: A: Top 10% of scores B: Scores between P70 and P go C: Middle 40% (scores between P30 and P70) D: Scores between P10 and P30 F: Bottom 10% of scores 20% 40% 20% 10% 10% P10 P30 P70 P90 CLASS #1: Suppose that the exam grades for Class #1 are as follows: 35 44 46 47 48 51 54 55 55 57 57 58 59 60 60 60 60 61 62 64 68 69 70 72 73 75 75 77 82 85 / = 61.3 0 = 11.5 a) Using the mean and standard deviation above and StatCrunch, determine "the curve" cutoffs. Round these test grade cutoffs to one decimal. Label them underneath the curve. Test Grades