Simpangan baku data 3 4 4 5 6 6 7 8 8 9 adalah....

rata rata = 6

sb = akar x - xi kuadrat / n
sb = akar 9 + 4 + 4 + 1 + 0 + 0 + 1 + 4 + 4 + 9 / 10
sb = akar 36/ 10
sb = akar 360 / 100
sb = 6