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: .
不是单边检验么 备择假设是小于号 应该是选择左边的统计量 不应该是负数么