Simpangan baku dari 9,6,6,5,4,7,3,8 adallah

jawab

data xi  = 9, 6, 6, 5, 4, 7, 3, 8
banyak data = 8
jumlah data = 48
rata-rata x = 48/8 = 6

s = √(x-xi)²/n

s = √ [1/6{ (6-9)² + 2(6-6)² + (6-5)² + (6-4)² +(6-7)² +(6-3)² +(6-8)²}]

s = √ [ 1/6 (9+0+1+4+1+9+4)]

s= √ [ 1/6 (18)]

s = √3