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Prateek Asked :

04-10-2021 Total Quality Management

Q. What is the mean deviation from the mean of the following observation:9,9,2,3,6,9,4?

A. 2.50
B. 2.62
C. 2.40
D. 2.57


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Dapzoi Verified
Commented on 2021-10-04 16:33:14 (IST)
Answer: D

Explanation: The mean of the given observation is (9+9+2+3+6+9+4)/7=6. Mean deviation from mean = (|6-9|+|6-9|+|6-2|+|6-3|+|6-6|+|6-9|+|6-4|)/7 = (3+3+4+3+0+3+2)/7=2.57.