- 计量经济学(00142) - 专业知识收录平台"> - 计量经济学(00142) - 专业知识收录平台">
A.方差非最小
B.X(下标3)与X(下标2)不相关时有偏
C.方差最小
D.X(下标3)与X(下标2)相关时有偏
正确答案是A
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