A.標(biāo)準(zhǔn)誤差B.測量誤差C.系統(tǒng)誤差D.隨機誤差
A.無應(yīng)答偏倚 B.混雜偏倚 C.信息偏倚 D.失訪偏倚
A.50% B.25% C.15% D.10%