NO.PZ2022123001000118
问题如下：
An increase in sample size is most likely to result in a:
选项：
A.narrower confidence interval B.Decrease significance level C.lower power of a test解释：
All else being equal, as the sample size increases, the width of the confidence interval also decreases and power of a test increases. The significance level is not related to the sample size.
为什么是变窄的
