单选题:在两个变量y与x的回归模型中,分别选择了四个不同的模型,它们的判定系数R2如下,其中拟合效果最好的为(  )。

题目内容:
在两个变量y与x的回归模型中,分别选择了四个不同的模型,它们的判定系数R2如下,其中拟合效果最好的为(  )。 A.模型①的相关指数为0.976
B.模型②的相关指数为0.776
C.模型③的相关指数为0.076
D.模型④的相关指数为0.351

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