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A.分組標志和指標
B.分組標志和次數(shù)
C.數(shù)量分組標志數(shù)值和頻數(shù)
D.品質(zhì)分組標志屬性和頻數(shù)

A.按數(shù)量標志分組的數(shù)列
B.按品質(zhì)標志分組的數(shù)列
C.按數(shù)量標志或品質(zhì)標志分組的數(shù)列
D.按數(shù)量指標分組的數(shù)列