SusieW2020-07-14 13:24:58
课后题第12题B问的解析没太明白,sample quite large与用不用dw方法有什么关系呢
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Kevin2020-07-14 13:51:05
同学你好!
书上的原话是这样的:If the sample is very large, the Durbin–Watson statistic will be approximately equal to 2(1 − r), where r is the sample correlation between the regression residuals from one period and those from the previous period.
即样本足够大时,Durbin–Watson statistic约等于 2(1 − r)。考试中一般都是满足的,可以直接使用。
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