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Question
The mean deviation of the data 2, 9, 9, 3, 6, 9, 4 from the mean is ______.
Options
2.23
2.57
3.23
3.57
Solution
The mean deviation of the data 2, 9, 9, 3, 6, 9, 4 from the mean is 2.57.
Explanation:
M.D. `(barx) = |x_i - barx|/n`
= `(4 + 3 + 3 + 3 + 0 + 3 + 2)/7`
= 2.57
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