The Test Scores for a Statistics course are given in the Excel below.

The data (X1, X2, X3, X4) are for each student.

X1 = score on exam #1

X2 = score on exam #2

X3 = score on exam #3

X4 = score on final exam

Your professor wants to know if all tests are created equal.

Looking at the Summary output, which two Exams have the biggest difference in average?

EXAM1 EXAM2 EXAM3 FINAL 73 80 75 65.8667 93 88 93 80.1667 89 91 06 78 96 98 100 84.9333 73 66 70 61.5333 53 46 55 43.7667 69 74 77 64.5667 47 56 60 49.8333 87 79 90 75.8333 79 70 88 71.0667 69 70 73 61.1 70 65 74 61.1 93 95 91 79.7333 79 80 73 65.8667 70 73 78 64.1333 89 96 83.2 78 75 68 63.7 81 90 93 79.3 88 92 86 76.7 78 83 77 68.9 82 86 90 76.7 86 82 89 75.8333 78 83 85 75.8333 76 83 71 64.5667 96 95 83.2