The mean grades of 30 students in both math and science is 85. If the mean absolute deviation of the grades in math is 1 and the mean absolute deviation for the grades in science is 8, which of the following staements are true?

A. The students scored higher grades in math than science

B. The grades of the students in science are a lot closer to 85 than the grades of the students in math.

C. The grades of the students in math are a lot closer to 85 than the grades of the students in science.

D. The students scored lower grades in math than in science

Question

Regina Moran

Mathematics

7 October, 13:04

The mean grades of 30 students in both math and science is 85. If the mean absolute deviation of the grades in math is 1 and the mean absolute deviation for the grades in science is 8, which of the following staements are true?

A. The students scored higher grades in math than science

B. The grades of the students in science are a lot closer to 85 than the grades of the students in math.

C. The grades of the students in math are a lot closer to 85 than the grades of the students in science.

D. The students scored lower grades in math than in science

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Answers (1)

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Roach · Answer 1

Mean absolute deviation is associated to the precision of the datasets acquired from the experiment. In this case, if the deviation increases, then the degree of variation also increases. The answer to this problem hence is C. The grades of the students in math are a lot closer to 85 than the grades of the students in science