反映样本均数代表观察值的代表性如何的指标是 A. mg src="https://cdn.shuashuati.com/imgs/2b9dcb6424891c79aff2ac7f6197b59c.png">A.标准差 B. 标准误 C. 变异系数 D. 四分位数间距 E. 极差
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举一反三
【简答题】into of for with after 1 . Each department is in the charge __________ a director who reports to the CEO directly. 2 . Personnel is responsible __________ recruitment, salaries, bonuses, and so ...