simpangan baku dari data 9, 6, 7, 8, 4, 2 adalah...

→ Rata - rata :
= 9 + 6 + 7 + 8 + 4 + 2 / 6
= 36 / 6
= 6

→ Ragam :
= (9 - 6)² + (6 - 6)² + (7 - 6)² + (8 - 6)² + (4 - 6)² + (2 - 6)² / 6
= 3² + 0² + 1² + 2² + -2² + -4² / 6
= 9 + 0 + 1 + 4 + 4 + 16 / 6
= 34 / 6
= 5,66

→ Simpangan Baku :
= √ragam
= √5,66