Variance

Answer – The Variance can be defined as the square of standard deviation. The variance of a variable X(symbolised as V) is the sum of squares of the deviations of each X score from the mean of X(σ) divided by number of observations (n).

Variance = σ²/N

You have already learned that standard deviation of variable X (σ ) is square root of variance of X √(fx²/N ).

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