伍sir啊,统计是俺家不记事吃饭的家伙,他可不能忘。。。 sb_>D`>
8^zI
三次方的模型其实 fit 的非常好,p 值很小很小,estimates 的值如下: kF~}htv.=
v'.?:S&m
Call: /40Z-'Bl=(
lm(formula = V3 ~ V1 + I(V1^2) + I(V1^3), data = a) GD|uU
iLy}G7h
Residuals: A0M)*9 f
Min 1Q Median 3Q Max @.-g
-14085.3 -7779.8 -689.7 7941.2 16891.5 @3[Z QF
o:#MP(h,N
Coefficients: (^eSm]<
Estimate Std. Error t value Pr(>|t|) r]km1SrS
(Intercept) -8.367e+05 9.471e+04 -8.835 3.07e-13 *** {t[j>_MYw
V1 8.584e+03 6.063e+02 14.159 < 2e-16 *** !xMyk>%2
I(V1^2) -1.945e+01 1.256e+00 -15.491 < 2e-16 *** 2"nd(+QH
I(V1^3) 1.267e-02 8.436e-04 15.018 < 2e-16 *** @4h .?
--- _{,e-_hYM
Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 (]>c8;o#b
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3`j
{
Residual standard error: 8724 on 75 degrees of freedom :gb7Py'C
Multiple R-squared: 0.9952, Adjusted R-squared: 0.995 'M+iVF6
F-statistic: 5175 on 3 and 75 DF, p-value: < 2.2e-16