simpangan baku dari data 3,4,4,5,5,6,6,7,7,8,8,9adalah

Rata-rata = 6
Rumus simpangan baku :
[tex]\begin{aligned}SB&=\sqrt{\dfrac{\sum(x_i-\bar{x})^2}{n}}\\&=\sqrt{\dfrac{(3-6)^2+(4-6)^2+\ldots+(9-3)^2}{12}}\\&=\sqrt{\frac{38}{12}}\end{aligned} [/tex]