ragam varian dari data 6,4,8,10,11,10,7

cari rata2 dulu
[tex] \frac{56}{7} = 8[/tex]
ragamnya
[tex] \frac{ {( 6 - 8)}^{2} + {(4 - 8)}^{2} + (8 - 8 {)}^{2} + {(10 - 8)}^{2} + {(11 - 8)}^{2} + ( {10 - 8)}^{2} + {(7 - 8)}^{2} }{7} \\ = \frac{ {( - 2)}^{2} + {( - 4)}^{2} + {0}^{2} + {2}^{2} + {3}^{2} + {2}^{2} + ( - 1 {)}^{2} }{7} \\ = \frac{4 + 16 + 0 + 4 + 9 + 4 + 1}{7} \\ = \frac{38}{7} \\ = 5 \frac{3}{7} [/tex]