standar deviasi dari data 2,11,1,10,3,9

jawab

2, 11, 1, 10 , 3, 9

banyak data = n = 6
jumlah data = fn = 36
rata rata X = 36/6 = 6

s² = (6-2)² + (6-11)² +(6-1)² +(6-10)² + (6 - 3)² + (6-9)² / (6)
s² = (16 + 25 + 25+ 16+ 9+ 9) / (6) = 100/6
standar deviasi = √(s²) = √(100/6) = 10/√6 = (10/6) √6 = (5/3) √6