NO.PZ2022123001000123
问题如下:
Independent samples drawn from normally distributed populationsexhibit the following characteristics:
Assuming that the variances of the underlying populations are equal, the pooled estimate of the common variance is 2,678.05. The t-test statistic appropriate to test the hypothesis that the two population means are equal is closest to:
选项:
A.
0.94
B.
1.90
C.
0.29
解释:
The t-statistic for the given information (normally distributed populations, population variances assumed equal) is calculated as:
u1-u2;为什么是0