想请问一下什么时候用卡方分布呢

问题如下：

When we want to check that whether the regression model as a whole is significant at the 0.1 level or not, which two data should be compared?

选项：

A.

T-statistic and the critical value for T at 0.1 level.

B.

F-statistic and the critical value for F at 0.1 level.

C.

$\chi^2$-statistic and the critical value for $\chi^2$at 0.1 level.

解释：

B is correct.

考点: Interpret Regression Coefficient, Assumptions and F-test.

解析: 根据定义，当我们想要知道这个回归模型作为一个整体在α =0.1时是否显著，我们需要进行F检验，当F统计量的绝对值大于α =0.1的临界点时，我们拒绝原假设，此时可以说the regression model as a whole is significant at the 0.1 level。所以选择B选项。