问题如下：
When doing the regression analysis, if the result shows that the P-value for X is 0.034, assuming that the significant level is 5%. Then, we can conclude that:
选项：
A.X cannot explain Y.
B.X is not significant.
C.X is significant.
解释：
C is correct.
考点: Regression Coefficient: T-test.
解析: 已知P-value等于0.034小于significant level( α =5%),所以我们拒绝原假设，可以得到X is significant这个结论，选择C选项。通过P-value和α的对比，我们只能确定拒绝还是不拒绝原假设，不能说变量X就不能解释变量Y了。所以A错误。
请问这种题是默认原假设是X is not significant吗，以及这个significant的意思是？
