3. Trying to determine the best cut-off value for determining a master in golfing, you request that a group of students taking a golf class and professional golfers all shoot one round. Class 88 98 96 79 83 85 38 99 79 Professionals 72 82 81 66 68 71 6873 74 a. Using cut-off scores of 70, 80, and 90, what is the best value for P? b. For the best value of P, what happens when chance is removed