NO.PZ201709270100000207
问题如下：
7. Based on her estimated Durbin–Watson statistic, Honoré should:
选项：
A. fail to reject the null hypothesis.
B. reject the null hypothesis because there is significant positive serial correlation.
C. reject the null hypothesis because there is significant negative serial correlation.
解释：
A is correct. The critical Durbin–Watson (D–W) values are dl = 1.63 and du = 1.72. Because the estimated D–W value of 1.81 is greater than du = 1.73 (and less than 2), she fails to reject the null hypothesis of no serial correlation.
请画图解析dw<2
