- 数量方法(二)(00994) - 专业知识收录平台"> - 数量方法(二)(00994) - 专业知识收录平台">
A.当X=0时,Y的期望值
B.当Y变动一个单位时,X的平均变动数额
C.当X变动一个单位时,Y增加的总数额
D.当X变动一个单位时,Y的平均变动数额
正确答案是D
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