Koefisien variasi 2 5 10 1 7 5

jawab

xi  = 2, 5, 10, 1, 7, 5
n = 6
∑xi= 30
X =  ∑xi /(n) = 30/6 = 5

s² = {(2-5)² +(5-5)² +(10-5)² +(1-5)²+(7-5)²+(5-5)²} /)6
s² = (9+0+25+16+4+0) /(6) 
s² = 54/6
s² = 9

S= √S² = √9 = 3

Koefisien Ragam = S/X (100%) = 3/5 x 100% = 60%