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The standard deviation of variate xi is ...

The standard deviation of variate `x_i` is σ. Then standard deviation of the variate `(ax_i+b)/c` where `a, b, c ` are constants is- (a) `(a/c)sigma` (b) `|a/c| sigma` (c) (a^2/c^2)sigma` (d) Non of these

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