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নমুনা পরিমিত ব্যবধানের সূত্র কোনটি? (What is the formula of the sample standard deviation ?)

\frac{\sum {(x_{i} - x)}^{2}}{n - 1}

\sqrt{\frac{\sum {(x_{i} - x)}^{2}}{n - 1}}

\frac{\sum (x_{i} - x)}{n - 1}

\frac{\sum |x_{i} - x|}{n - 1}

ANS : 0

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