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| 1. |
Find the mean deviation about the mean for the following data: (2 score each)1. 4, 7, 8, 9, 10, 12, 13, 17.2. 38, 70, 48, 40, 42, 55, 63, 46, 54, 44. |
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Answer» 1.
\(\bar{x}\) = \(\frac{\displaystyle \sum_{i = 1}^n x_i}{n}\) = \(\frac{80}{8}\) = 10 M.D (\(\bar x\)) = \(\frac{\displaystyle \sum_{i = 1}^n |x_i-\bar x|}{n}\) = \(\frac{24}{8} = 3\) 2.
\(\bar x\) = \(\frac{\displaystyle \sum_{i = 1}^n x_i}{n}\) = \(\frac{500}{10} = 50 \) M.D (\(\bar x\)) = \(\frac{\displaystyle \sum_{i = 1}^n |x_i-\bar x|}{n}\) = \(\frac{84}{10} = 8.4\) |
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