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??

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musiclover10045 musiclover10045 · Answer 1 · 2017-10-12T22:07:41+02:00

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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lhmarianateixeira lhmarianateixeira · Answer 2 · 2022-02-11T13:29:36+01:00

in this exercise we have to calculate the averages of the scores so we have to:

A)85.2

B)7.44

First, let's calculate the average score as:

[tex]98 +78+84 +75 +91 = 426/5 = 85.2[/tex]

Find the difference between the average and each test score, after that we will calculate the total average of all grades then:

[tex]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=12.8 + 7.2 + 1.2 +10.2 +5.8 =37.2/5 = 7.44[/tex]

See more about averages at brainly.com/question/2426692