Simpangan baku dari data : 2 , 3 , 6 , 6 , 8 , 11 adalah …

2, 3, 6, 6, 8, 11
Rata-rata = (2+3+6+6+8+11)/6
= 36/6 = 6
SD = V{(2-6)^2 +(3-6)^2+2(6-6)^2+(8-6)^2+(11-6)^2}/ 6
SD = V{(16+9+0+4+25)/6}
SD = V(54/6)
SD = V54/V6
SD = 3V7/V6
SD = 3V42/6
SD = 1/2V42