A.偏高 B.偏低 C.無影響
A.15 B.20 C.30 D.45 E.60
A.批內變異系數(shù)<5%,批間變異系數(shù)<10% B.批內變異系數(shù)<8.33%,批間變異系數(shù)<12% C.批內變異系數(shù)<3%,批間變異系數(shù)<8% D.批內變異系數(shù)<8.33%,批間變異系數(shù)<10% E.批內變異系數(shù)<5%,批間變異系數(shù)<12%