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Sagot :
by definition the standar deviation is the square root of the variance
[tex]s=\sqrt[]{s^2}[/tex]if you have the standrar deviation you should do the opposite
[tex](s)^2=s^2[/tex]replacing in the formula
[tex]\begin{gathered} s^2=(9.4)^2 \\ s^2=88.36 \\ s^2\approx88.4 \end{gathered}[/tex]the variance is 88.4 aproximately
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