koefisien variasi dari data 4,5,5,4,7,5

jawab

statistik

xi  4, 5, 5, 4, 7, 5 
∑xi = 30
n = 6
X= 30/6 = 5

SD² =∑(xi-X)²/(n)
SD² = [ 1/6 { 2(4-5)²+ 3(5-5)²+(7-5)² ]
SD² = [ 1/6  (2+ 4) ]
SD² = 1
SD= 1

KV =  S/X  . 100 %
KV = 1/5 x 100%
KV = 20 %