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10 questions from this quiz
Average deviation from the mean
σ2\sigma^2σ2 (mean square deviation)
Standard deviation is square root of variance
σ2=Σ(x−xˉ)2n\sigma^2 = \frac{\Sigma (x - \bar{x})^2}{n}σ2=nΣ(x−xˉ)2
Mean of all squared data
To make deviations positive
Standard deviation (σ\sigmaσ)
Interquartile range (IQR)
Range
3.53.53.5
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