问题如下：
Assuming that there are two variables, X is independent variable, Y is dependent variable, and sample size is 102. The test statistic of the coefficient is 2.44. Given the significance level is 1%, and the corresponding critical value is 2.63, is the test-statistics significant or not ?
选项：
A. significant
B. Not significant
C. Cannnot determine
解释：
由于计算出来的test statistics（2.44），小于临界值2.63，所以不能拒绝显著性检验的原假设 （not significantly different from 0）
老师问下 这个给出的1% 对应2.58的临界值 为什么不是2.44跟2.58比 而是要和2.63比