楼主: moontown
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[求助]一道线性回归的问题 [推广有奖]

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moontown 发表于 2008-10-18 00:36:00 |AI写论文

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一道习题:

a regression of average weekly earnings(AWE,measured in dollars) on age (measured in years) using a random sample of college-educated full-time workers aged 25-65 yields the following:

AWE=696.7+9.6Age,  R2=0.023,  SER=624.1

(A)

(G) given what you know about the distribution of earnings, do you think it is plausible that the distribution of errors inthe regression is normal?(Hint: do you think that the distribution is aymmetric or skewed? What is the smallest value of earnings and is it consistent with a normal distribution?)

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关键词:线性回归 distribution regression consistent regressio 求助 线性回归

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qffq 发表于2楼  查看完整内容

More information (in (A)-(F)?) is needed to answer the question. "Given what you know about the distribution of earnings", indicates you have a plot of the AWE distribution? Based on the small value of R^2 (only 2.3% variance explained by the model) and relatively large value of SER, the answer is probably a skewed distribution for the error terms.

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qffq 发表于 2008-10-18 01:07:00

More information (in (A)-(F)?) is needed to answer the question. "Given what you know about the distribution of earnings", indicates you have a plot of the AWE distribution?

Based on the small value of R^2 (only 2.3% variance explained by the model) and relatively large value of SER, the answer is probably a skewed distribution for the error terms.

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藤椅
moontown 发表于 2008-10-18 10:26:00

回复:(qffq)More information (in (A)-(F)?) is ne...

没有了,A到F除了说到"the standard error of the coefficient value 9.6 is 100 ”,其余都是一些非常基础的概念性问题。

可能是我的英语不好,没能读懂这道题问的到底是什么?

麻烦大虾解答^_^

板凳
sd4838699 发表于 2008-11-1 23:57:00

我晕  白学了  居然不会~~~555555

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