Question

Mrs. Smith gives three quizzes before each test,
she allows each student to drop their lowest test grade during the grading period and replace it with the average of their quiz grades. The grades in red below were replaced with the average quiz grades.

Part 1: How does this change the data for Classes A and C?
Part 2: Based upon these changes which of the three classes did the best on the exam? Justify your answer.

Answer 1

Class A Class B Class C
80 90 100
85 90 90
87 85 94
92 84 100
86 91 75
90 78 84
94 94 94
100 86 72
75 82 85
70 78 87
85 86 72
38 78 100
72 95 90
94 90 94
82 88 60

Answer 2

class c
100
90
94
100
75
84
94
72
85
87
72
100
90
94
60