simpangan baku dari data 6,6,5,4,8,5 dab 8 adalah

→ Rata - rata :
= 6 + 6 + 5 + 4 + 8 + 5 + 8 / 7
= 42 / 7
= 6

→ Ragam :
= (6 - 6)² + (6 - 6)² + (5 - 6)² + (4 - 6)² + (8 - 6)² + (5 - 6)² + (8 - 6)² / 7

= 0² + 0² + (-1)² + (-2)² + 2² + (-1)² + 2² / 7

= 1 + 4 + 4 + 1 + 4 / 7

= 14 /7
= 2

→ Simpangan Baku :
= √ragam
= √2