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【多选题】
如果某地区工人的日工资收入(元)随劳动生产率(千元 / 人时)的变动符合简单线性方程 Y=60+90X ,下列的判断中正确的有:
A.
当劳动生产率为 1 千元 / 人时，估计日工资为 150 元；
B.
劳动生产率每提高 1 千元 / 人时，则日工资一定提高 90 元；
C.
劳动生产率每降低 0.5 千元 / 人时，则日工资平均减少 45 元；
D.
当日工资为 240 元时，劳动生产率可能达到 2 千元 / 人。
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