Ragam dari data 8,8,6,6,8, dan 12 adalah.... *pakai cara

Rata-rata = (8+8+6+6+8+12)/6 = 8
Ragam = [(8-8)²+(8-8)²+(6-8)²+(6-8)²+(8-8)²+(12-8)²]/6
= (0+0+4+4+0+16)/6
= 24/6
= 4