intercept那一行有什么用

问题如下：

Whisky wants to investigate that whether variable A and B have a linear relationship with variable C, and variable A and B are independent variables, variable C is dependent variable. He does the multiple regression analysis and gets the following results:

If n is 51, which of the following conclusions is most likely correct?

选项：

Both A and B are significant at the 0.1 level.

A is significant at the 0.1 level.

B is significant at the 0.1 level.

解释：

B is correct.

考点: Regression Coefficient: T-test.

解析: 这道题可以直接通过比较P-value和α的值来判断是否significant。当P-value小于α时，我们拒绝原假设，此时变量是significant的。在这题中，只有变量A符合条件，所以A is significant at the 0.1 level。选择B选项。