A.17.6% B.85% C.115% D.117.6%
A.隨總體范圍增大而增大 B.隨總體范圍增大而縮小 C.隨總體范圍縮小而增大 D.與總體范圍大小無關(guān)
A.單相關(guān) B.復相關(guān) C.偏相關(guān) D.函數(shù)關(guān)系