simpangan baku dari 8,7,5,6,9,3,4 ad

langsung aja yy

X = (8+7+5+6+9+3+4) / 7
X = 42/7 = 6

maka

Sb = √(8-6)²+(7-6)²+(5-6)²+(6-6)²+(9-6)²+(3-6)²+(4-6)² / 7

Sb = √4+1+1+0+9+9+4 / 7

Sb = √ 28/7

Sb = √4

Sb = 2

semoga berguna +_+