NO.PZ2020010304000040
问题如下:
What are the trade-offs when choosing the size of a test?
选项:
解释:
A small test size reduces the probability of a Type I error, that is, rejecting the null when it is true. It also lowers the power of the test, that is the chance of rejecting a false null because smaller sizes correspond to larger critical values.
critical value来说可以理解成mean+和减,几倍的标准误,标准误=标准差/根号N,所以N越小,标准误就越大,如果是减标准误的话,标准误越大,z越小。这样对吗?