What is the mean deviation of 3, 5, 8, 11, 12 and 21?
A
4.7
B
60
C
3.7
D
10
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
Mean \(= \bar{x} = \frac{60}{6} = 10\)
mean deviation \(= \frac{\sum|x-\bar{x}|}{n} = \frac{28}{6}\)
= 4.7
Source: Myschool Past Questions Archive (Record #9218)