What are the criteria for deciding variability between two groups in statistics class 11th?

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Please find below the solution to the asked query:

$$\begin{gathered} \mathrm{Variability} \mathrm{is} \mathrm{the} \mathrm{extent} \mathrm{to} \mathrm{which} \mathrm{data} \mathrm{points} \mathrm{in} \mathrm{a} \mathrm{statistical} \mathrm{distribution} \mathrm{or} \mathrm{data} \mathrm{set} \mathrm{diverge} \\ \mathrm{from} \mathrm{the} \mathrm{average}, \mathrm{or} \mathrm{mean}, \mathrm{value} \mathrm{as} \mathrm{well} \mathrm{as} \mathrm{the} \mathrm{extent} \mathrm{to} \mathrm{which} \mathrm{these} \mathrm{data} \mathrm{points} \mathrm{differ} \mathrm{from} \mathrm{each} \mathrm{other}. \\ \mathrm{There} \mathrm{are} \mathrm{four} \mathrm{commonly} \mathrm{used} \mathrm{criterion} \mathrm{for} \mathrm{measures} \mathrm{of} \mathrm{variability}: \\ 1. \mathrm{Range} \\ 2. \mathrm{Mean} \\ 3. \mathrm{Variance} \\ 4. \mathrm{Standard} \mathrm{deviation} \end{gathered}$$

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