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Answered

if a data set has 25 values and a standard deviation of 9.4 then the variance is a. 88.4 b. 1.9 c.47.0d.17.7

Answer :

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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