两个随机变量x，y的取值表为 x0134y2.24.34.86.7若x，y具有线性相关关系，且 y^ = b^ x+2.6，则下列四个结论错误的是_刷题宝

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两个随机变量x，y的取值表为

x	0	1	3	4
y	2.2	4.3	4.8	6.7

若x，y具有线性相关关系，且 y^ = b^ x+2.6，则下列四个结论错误的是（）

A：x与y是正相关

B：当x=6时，y的估计值为8.3

C：x每增加一个单位，y增加0.95个单位

D：样本点（3，4.8）的残差为0.56

上一题下一题 0.0难度选择题更新时间:2019-12-26 04:08:46

答案(点此获取答案解析）

D

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