问题如下图：
选项：
A. 
B. 
C. 
提问：老师，我觉得abc都是对的，请问为何选c。请指教，谢谢。 解释：
菲菲_品职助教 · 2018年10月26日
同学你好，A选项说P值用来当做假设检验判断的一个证据比临界值点精确度要低，这个描述是欠妥的。因为我们可以直接通过比较P值和α，就可以直接判断假设检验的结果，这个其实是更精确的一个判断依据。
B选项说，P值是用来拒绝原假设最大的一个显著性水平。这句话说反了。P-value应该是最小的能拒绝原假设的显著性水平。（这也是原版书和讲义的原话）
我们怎么来理解这句话呢？因为P值越小越拒绝原假设。当p值小于α时，我们拒绝原假设。就如何老师在基础班中讲的一样，举个例子，已知p值=6%，问α怎么设定才能拒绝原假设。因为当p值小于α时，我们拒绝原假设，所以α至少要大于等于6%，我们才能拒绝原假设，也就可以理解成P-value是最小的能拒绝原假设的显著性水平。
NO.PZ2017092702000133 问题如下 Whiof the following statements is correwith respeto the p-value? A.It is a less precise measure of test evinthrejection points. B.It is the largest level of significanwhithe null hypothesis is rejecte C.It ccomparerectly with the level of significanin reaching test conclusions. C is correct.When rectly comparing the p-value with the level of significance, it cusealternative to using rejection points to reaconclusions on hypothesis tests. If the p-value is smaller ththe specifielevel of significance, the null hypothesis is rejecte Otherwise, the null hypothesis is not rejecte对于一个分布而言，每个概率面积在横轴上都有一个对应点，例如significanlevel α对应的分位点就是临界值criticvalue（假设正态分布下α=95%，双尾检验，则右尾就会对应criticvalue=1.96）。而p-value也是一个概率面积，对应的点就是计算出来的检验统计量的那个点。所以当p-value＜α时，就等价于检验统计量＞criticvalue，也就是拒绝原假设。 能方便一下- 为何是smallest 而不是 largest 吗？ 以下为我的理解 - p-value 是一个概率， i.e. 如果 p-value 为 0.06 - 则我们可以理解为有 6% 的可能性 the null hypothesis 为 true （base on the available samples). 而 level of significan只是一个 pre-finethresholof rejecting null hypothesis - i.e. if p-value = thresholthen we conclu there is statisticevinto support null hypothesis being true, otherwise, we rejenull hypothesis. e.g. when p-value 0.05 level of significan= 0.05 -- 则我们可以rejenull. Regaress p-value = 0.04, 0.03 etc -- 我们都可以rejenull， 那么level of significan岂不是一个upper boun 而p-value 也可以理解为 一个大值 where we coulrejea null? 请问我的理解错在了哪里？ 谢谢
NO.PZ2017092702000133问题如下 Whiof the following statements is correwith respeto the p-value?A.It is a less precise measure of test evinthrejection points. B.It is the largest level of significanwhithe null hypothesis is rejecte C.It ccomparerectly with the level of significanin reaching test conclusions. C is correct.When rectly comparing the p-value with the level of significance, it cusealternative to using rejection points to reaconclusions on hypothesis tests. If the p-value is smaller ththe specifielevel of significance, the null hypothesis is rejecte Otherwise, the null hypothesis is not rejecte对于一个分布而言，每个概率面积在横轴上都有一个对应点，例如significanlevel α对应的分位点就是临界值criticvalue（假设正态分布下α=95%，双尾检验，则右尾就会对应criticvalue=1.96）。而p-value也是一个概率面积，对应的点就是计算出来的检验统计量的那个点。所以当p-value＜α时，就等价于检验统计量＞criticvalue，也就是拒绝原假设。 请问老师，a错在哪里？
NO.PZ2017092702000133问题如下Whiof the following statements is correwith respeto the p-value?A.It is a less precise measure of test evinthrejection points. B.It is the largest level of significanwhithe null hypothesis is rejecte C.It ccomparerectly with the level of significanin reaching test conclusions. C is correct.When rectly comparing the p-value with the level of significance, it cusealternative to using rejection points to reaconclusions on hypothesis tests. If the p-value is smaller ththe specifielevel of significance, the null hypothesis is rejecte Otherwise, the null hypothesis is not rejecte对于一个分布而言，每个概率面积在横轴上都有一个对应点，例如significanlevel α对应的分位点就是临界值criticvalue（假设正态分布下α=95%，双尾检验，则右尾就会对应criticvalue=1.96）。而p-value也是一个概率面积，对应的点就是计算出来的检验统计量的那个点。所以当p-value＜α时，就等价于检验统计量＞criticvalue，也就是拒绝原假设。 p value和test statistic 的关系？
NO.PZ2017092702000133 问题如下 Whiof the following statements is correwith respeto the p-value? A.It is a less precise measure of test evinthrejection points. B.It is the largest level of significanwhithe null hypothesis is rejecte C.It ccomparerectly with the level of significanin reaching test conclusions. C is correct.When rectly comparing the p-value with the level of significance, it cusealternative to using rejection points to reaconclusions on hypothesis tests. If the p-value is smaller ththe specifielevel of significance, the null hypothesis is rejecte Otherwise, the null hypothesis is not rejecte对于一个分布而言，每个概率面积在横轴上都有一个对应点，例如significanlevel α对应的分位点就是临界值criticvalue（假设正态分布下α=95%，双尾检验，则右尾就会对应criticvalue=1.96）。而p-value也是一个概率面积，对应的点就是计算出来的检验统计量的那个点。所以当p-value＜α时，就等价于检验统计量＞criticvalue，也就是拒绝原假设。 请老师指导，B哪里错了？
NO.PZ2017092702000133 问题如下 Whiof the following statements is correwith respeto the p-value? A.It is a less precise measure of test evinthrejection points. B.It is the largest level of significanwhithe null hypothesis is rejecte C.It ccomparerectly with the level of significanin reaching test conclusions. C is correct.When rectly comparing the p-value with the level of significance, it cusealternative to using rejection points to reaconclusions on hypothesis tests. If the p-value is smaller ththe specifielevel of significance, the null hypothesis is rejecte Otherwise, the null hypothesis is not rejecte对于一个分布而言，每个概率面积在横轴上都有一个对应点，例如significanlevel α对应的分位点就是临界值criticvalue（假设正态分布下α=95%，双尾检验，则右尾就会对应criticvalue=1.96）。而p-value也是一个概率面积，对应的点就是计算出来的检验统计量的那个点。所以当p-value＜α时，就等价于检验统计量＞criticvalue，也就是拒绝原假设。 能不能翻译一下每个？不怎么了解