Find the mean deviation about mean for numbers: 3, 6, 9, 12, 15.

Topic: Statistics
Subtopic: Mean Deviation

A2.4

B3.0

C3.6

D4.2

Explanation

Mean = 45 / 5 = 9. Absolute deviations: |3-9|=6, |6-9|=3, |9-9|=0, |12-9|=3, |15-9|=6. Sum = 18. Mean deviation = 18 / 5 = 3.6.

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