Simpangan Baku dari data 4,2,6,8 adalah

cari rata2 dahulu
[tex] \frac{20}{4} = 5[/tex]
cari ragam dulu
[tex] = \frac{ {(5 - 4)}^{2} + {(2 - 5)}^{2} + {(6 - 5)}^{2} + {(8 - 5)}^{2} }{4} \\ = \frac{ {1}^{2} + {( - 3)}^{2} + {1}^{2} + {3}^{2} }{4} \\ = \frac{1 +9 + 1 + 9 }{4} \\ = \frac{20}{4} \\ = 5[/tex]
maka simpangan bakunya
[tex] \sqrt{ragam} = \sqrt{5} [/tex]