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：
A.Both A and B are significant at the 0.1 level.
B.A is significant at the 0.1 level.
C.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。
老师您好，有两个疑问，麻烦您解答：1、麻烦解释下p-value的答题方法中，用表里的A和B的pavalue跟阿尔法0.1比大小么，越小越拒绝？2、这道题我想的是用t-test，用【b1(ba)+/-t(c)b1(ba)标准误】公式计算出的区间值，其中t(c)=1.65，然后看表里的t-statistics中的A和B的数字是否落到拒绝域，以此判断A和B是否significance，这样计算出的结果是A和B都拒绝原假设，请问哪里出错了呢？多谢
