Martin earned the following scores on his last five tests. 98, 78, 84, 75, 91 What is the mean absolute deviation of his scores?
2 answers:
Answer:
<h2>
7.44√</h2>
Step-by-step explanation:
find the average of his scores:
98 +78+84 +75 +91 = 426/5 = 85.2
now find the difference between the average and each test score:
98 - 85.2 = 12.8
85.2 -78 = 7.2
85.2 - 84 = 1.2
85.2 -75 = 10.2
91-85.2 = 5.8
total those and divide by the number of tests
12.8 + 7.2 + 1.2 +10.2 +5.8 =37.2/5 = 7.44
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