L2，2011年sample version1 第11题答案是不是错了？ critical, positive, hypothesis, conclusion, 检验

wanghaha

回归的DW值是1.9566，答案却选C: the most appropriate conclusion is significant serial correlation is present and the standard errors are likely to be underestimated.

答案注解还要离谱：
the value of D-W statistic exceeds the upper critical value(1.9566>1.73). We fail to reject the null hypothesis of no positive serial correlation. When serial correlation is present, the standard errors of the estimates are artificially small...brabra

不是说DW检验大于Du小于4-Dl的情况下，there is no serial correlation的吗!

wanghaha

觉得今年sample和mock有好多错误，有的是拼写错误，有的是遗漏错误，还有的直接是答案错误，甚至答案解释一起错！