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1、當(dāng)所有的觀察值y都落在直線(xiàn)yc=a+bx上時(shí),則x與y之間的相關(guān)系數(shù)為( ) A、定基指數(shù)和環(huán)比指數(shù) B、數(shù)量指標(biāo)指數(shù)和質(zhì)量指標(biāo)指數(shù) C、個(gè)體指數(shù)和總指數(shù) D、綜合指數(shù)和平均數(shù)指數(shù)
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2022 07/20 14:29
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