题目内容

收集了n组数据(xi,yi),i=1,2,…,n,在一元线性回归中用SR表示回归平方和,SE表示残差平方和,由此求得F比,则当()时在显著性水平α上认为所得到的回归方程是有意义的。

A. F>F1-α(1,n)
B. F>F1-α(1,n-1)
C. F>F1-α(1,n-2)
D. F<F1-α(1,n-2)

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听力原文:W: Hi. Can I help you?
M: Hi. I've, uh, just opened a checking account and I want to withdraw 150 euros. What I want to know is, who do I make the check out to?
W: Well, since the money is for you yourself, you make it out to cash.
M: OK. W... how do I do that?
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W: Well, you've written the amount in numbers, but you have to write it out in words, too. That goes on the second line, there.
M: Oh, yeah.
W: By the way, it's a good idea to draw a line from the end of the amount to the word "euros" so nobody can change the amount.
M: Oh, thanks. Well, tlaat should do it. Here you go.
W: You forgot to sign your name. There, in the bottom right corner.
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