问题如下图:
选项:
A.
B.
C.
解释:
这一题B C 答案一样
NO.PZ2015120604000136问题如下Suppose a hypothesis test with a 5% significant level. Whis the criticvalue of a z-statistic if it is a two-tailetest?A.±1.65B.±1.96.C.+1.96B is correct.A two-tailez-test a 5% significant level means the criticvalue is z=-1.96 or z=+1.96.为什么reject的部分叫significant level呢?
NO.PZ2015120604000136问题如下 Suppose a hypothesis test with a 5% significant level. Whis the criticvalue of a z-statistic if it is a two-tailetest?A.±1.65B.±1.96.C.+1.96B is correct.A two-tailez-test a 5% significant level means the criticvalue is z=-1.96 or z=+1.96.双尾检验应该是有两个值,为啥只要正的
请问如果是单尾检验,criticvalue是正负还是只有一个?
老师好,我怎么确定题中说的是双尾加起来5%而不是一边各5%呢