When grading using “the curve”, the percentages are as follows: A: Top 10% of scores B: Scores between P70 and P90 C: Middle 40% (scores between P30 and P70) D: Scores between P10 and P30 F: Bottom...

When grading using “the curve”, the percentages

are as follows:
A: Top 10% of scores
B: Scores between P70 and P90
C: Middle 40% (scores between P30 and P70)
D: Scores between P10 and P30
F: Bottom 10% of scores

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
µ = 61.3  = 11.5
a) Using the mean and standard deviation above and the invNorm feature of your calculator,
determine “the curve” cutoffs for the PK values listed above. (These are not standard deviations.)

Round these test grade cutoffs to one decimal. Label them underneath the curve.
Test Grades  0 ____ ____ ____ ____ 100