varians (ragam) dari data 2,4,4,6,6,8 adalah

Rata-rata = (2 + 4 + 4 + 6 + 6 + 8)/6 = 30/6 = 5
Ragam = [(2-5)² + (4-5)² + (4-5)² + (6-5)² + (6-5)² + (8-5)²] / 6
= (9 + 1 + 1 + 1 + 1 + 9) / 6
= 22/6
= 11/3
= 3 2/3
= 3,67