1. An instructor wishes to review students doing poorly in his large-room lecture courses, so that he can schedule individual appointments with them

1. An instructor wishes to review students doing poorly in his large-room lecture courses, so that he can schedule individual appointments with them and offer extra help. He has time to meet with only 15 students. The data in the table below lists student ID numbers and their current averages in the course. The professor asks your as the teaching assistant, to answer the following questions.

a.    Create a Pareto chart showing the grades of the 15 students currently doing the worst.

b.   Report what percentage of the total range of grades is represented by the range of the 15 worst grades.