simpangan baku dari data : 7,8,9,10,11 adalah

jawab

statistik

xi = 7,8,9,10,11
n = 5
∑xi= 45
X= 45/5 = 9

s = √ {1/n ∑(xi-X)²}
s = √ { 1/9 {(7-5)²+(8-5)²+(9-5)²+(10-5)²+(11-5)²}
s = √ 1/9 (4+9+16+25+36)
s = √1/9(90)
s = √10
s = 3,16