35. Varians dari data 12, 4, 10, 6, 9, 7, 8, adalah..

Data = 4,6,7,8,9,10,12
x̄ = 4+6+7+8+9+10+12 / 7
= 56 / 7
S² = Σfi(Xi - x̄)² / n
= 1(4-8)² + 1(6-8)² + 1(7-8)² + 1(8-8)² + 1(9-8)² + 1(10-8)² + 1(12-8)² / 7
= 1(-4)² + 1(-2)² + 1(-1)² + 1(0) + 1(1)² + 1(2)² + 1(4)² /7
= 16 + 4 + 1 + 0 + 1 + 4 + 16 / 7
= 42 / 7
=6