假设检验 

在有随机性参与的数学计算中，理论值和你实验室取样后算出来的计算值是会有一定程度的偏差的。所以，假设
检验的用处就是告诉你，你算没算错。


Hypothesis Testing
(1)Known Variance, unknown mean (Two-sided)

例子：

• p-value of 0.139 can be interpreted as follows:
If the null was true,difference from the null as the one that we saw would be around 0.139

(2)Known Variance, unknown mean(One-sided)



(3)Unknown Variance



(4)Known Variance Difference of Means



(5)Unknown Variance Difference of Means





Conclusion