Martin earned the following scores on his last five tests. 98, 78, 84, 75, 91 What is the mean absolute deviation of his scores? 37.2 0 6.2 7.44 Please help??
Accepted Solution
A:
find the average of his scores:98 +78+84 +75 +91 = 426/5 = 85.2now find the difference between the average and each test score:98 - 85.2 = 12.885.2 -78 = 7.285.2 - 84 = 1.285.2 -75 = 10.291-85.2 = 5.8 total those and divide by the number of tests12.8 + 7.2 + 1.2 +10.2 +5.8 =37.2/5 = 7.44