伍sir啊,统计是俺家不记事吃饭的家伙,他可不能忘。。。 X"g,QqDD
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三次方的模型其实 fit 的非常好,p 值很小很小,estimates 的值如下: H&F2[ j$T
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Call: +kxk z"fP
lm(formula = V3 ~ V1 + I(V1^2) + I(V1^3), data = a) Bqa_l|
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Residuals:
#z.\pd
Min 1Q Median 3Q Max =? q&/
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-14085.3 -7779.8 -689.7 7941.2 16891.5 ^tm2Duv
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Coefficients: d/*EuJYin<
Estimate Std. Error t value Pr(>|t|) }V.fY3J-
(Intercept) -8.367e+05 9.471e+04 -8.835 3.07e-13 ***
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V1 8.584e+03 6.063e+02 14.159 < 2e-16 *** 1y U!rEH
I(V1^2) -1.945e+01 1.256e+00 -15.491 < 2e-16 *** %Gu=Dkz
I(V1^3) 1.267e-02 8.436e-04 15.018 < 2e-16 *** *"F*6+}w"
--- t
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Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 Qd% (]L[N.
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Residual standard error: 8724 on 75 degrees of freedom X%iqve"{nB
Multiple R-squared: 0.9952, Adjusted R-squared: 0.995 iK'A m.o+
F-statistic: 5175 on 3 and 75 DF, p-value: < 2.2e-16