100 5
ϕ ϕ ϕ ϕ ϕ ϕ ϕ ϕ
1 7 30 13 19 1 7 40 56 13 19 1 7 405 58 13 19 (0 5 10 15 20 40 ) ( ) 14 80 160 320 20
X = x1 + x2 + x3 + Λ Λ x n X X x x x x 1 + 2 + 3+ Λ Λ n = n
X X d d1 + d2 + d3 + Λ Λ + d n d = n D = d 100% X