Let x1,x2,…,x100 be 100 observations such that 100∑i=1xi=0, ∑1� – InterviewSolution

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1.	Let x1,x2,…,x100 be 100 observations such that 100∑i=1xi=0, ∑1≤i<j≤100\|xixj\|=80000 and mean deviation from their mean be 5. Then their standard deviation is
Answer» Let $x_{1}, x_{2}, \dots, x_{100}$ be $100$ observations such that $100 \sum i = 1 x_{i} = 0,$ $\sum 1 \leq i < j \leq 100 \| x_{i} x_{j} \| = 80000$ and mean deviation from their mean be $5.$ Then their standard deviation is

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