NO.PZ2022123001000106
问题如下：
A two-tailed t-test of the hypothesis that the population mean differs from zero has a p-value of 0.0275. Using a significance level of 5%, the most appropriate conclusion is:
选项：
A.to accept the null hypothesis B.to reject the null hypothesis C.that the chosen significance level is too high解释：
The p-value is the smallest level of significance at which the null hypothesis can be rejected. In this case, the given p-value (0.0275) is less than the given level of significance (0.05); therefore, the null hypothesis is rejected.
像这种题我需要考虑单双尾的情况吗？这里面的阿尔法是5%。那双尾就是2.5%？
