NO.PZ2015120604000140
问题如下:
Here is a table shows a set of data. Peter sets up a null hypothesis--- H0: μ≥8.5. What is the calculated test statistic?
选项:
A. 1.7877
B. -1.7877
C. 2.3656
解释:
A is correct.
The test statistic: .
样本标准差和总体的标准差什么时候可以混用呢