The mean deviation for n observations x1, x2, ...,xn from their mean X – InterviewSolution

1.	The mean deviation for n observations x1, x2, ...,xn from their mean X is given by(a) ∑i=1nxi-X (b) 1n∑i=1nxi-X (c) ∑i=1nxi-X2 (d) 1n∑i=1nxi-X2
Answer» The mean deviation for n observations $x_{1}, x_{2}, . . ., x_{n}$ from their mean $X$ is given by (a) $\sum_{i = 1}^{n} (x_{i} - X)$ (b) $\frac{1}{n} \sum_{i = 1}^{n} (x_{i} - X)$ (c) $\sum_{i = 1}^{n} {(x_{i} - X)}^{2}$ (d) $\frac{1}{n} \sum_{i = 1}^{n} {(x_{i} - X)}^{2}$

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