tolong ya kk. terima kasih

Data : 8,7,5,6,4,6

rata2 = x = (8+7+5+6+4+6)/6 = 36/6 = 6

Simpangan baku
= √(((8-6)² + (7-6)² + (5-6)² + (6-6)² + (4-6)² + (6-6)²)/6)
= √((4 + 1 + 1 + 0 + 4 + 0)/6)
= √(10/6)
= √(60/36)
= √60 / √36
= √4 . √15 / 6
= 2/6 √15
= 1/3 √15