OTET Paper 2 Social Science 2017 Paper

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Question : 28 of 120

Marks: +1, -0

What is the formula for calculating the SD of ungrouped data?

$\;{Σ FX}/{N}$
$\;{Σ FX^{2}}/{N}$
$√{\;{Σ(X-\ov{X})^2}/{N}}$
$√{\;{Σ X^{2}}/{N}− (\;{Σ FX}/{N}) ^{2}}$

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