A.頻率值 B.統(tǒng)計值 C.代表值 D.標準值
A.24.5~28.4 B.20.8~24.4 C.17.2~20.7 D.13.9~17.1
A.8.0~10.7 B.5.5~7.9 C.10.8~13.8 D.13.9~17.1