Simpangan baku dari data 4,8,7,5,6,9,3,6,

Maaf kalo gambarnya kurang jelas

_. 4+8+7+5+6+9+3+6. 48
X = _______________ = ___
8 8

S² = (4-6)²+(8-6)²+(7-6)²+(5-6)²+.
(6-6)²+(9-6)²+(3-6)²+(6-6)²
_____________________
8
S² = 4+4+1+1+0+9+9+0
_______________
8
S²= 28
___
8

S² = 3,5