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
A.單相關 B.復相關 C.偏相關 D.函數關系