Given forecast errors of -1, 5, 9, and -3, what is the mean absolute deviation?
A) 2
B) 3.5
C) 4.5
D) 8.6
E) 18

Name: Given forecast errors of -1, 5, 9, and -3, what is the mean absolute deviation? A) 2 B) 3.5 C) 4.5 D) 8.6 E) 18
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Question

Quizplus · Accepted Answer

The mean absolute deviation is calculated by taking the absolute values of the forecast errors, summing them, and then dividing by the number of errors: (|-1| + |5| + |9| + |-3|) / 4 = (1 + 5 + 9 + 3) / 4 = 18 / 4 = 4.5.

Given Forecast Errors of -1, 5, 9, and -3, What