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12 questions from this quiz
Average deviation of data from the mean
Squared spread of data
σ=σ2\sigma = \sqrt{\sigma^2}σ=σ2
σ2=Σ(x−xˉ)2n\sigma^2 = \frac{\Sigma (x - \bar{x})^2}{n}σ2=nΣ(x−xˉ)2
σ2=x2‾−(xˉ)2\sigma^2 = \overline{x^2} - (\bar{x})^2σ2=x2−(xˉ)2
The mean of all squared data
The mean of all data then squared
To make the deviations positive
Standard deviation
Range
Interquartile range
When the highest value is unknown
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