扑扑扑 · 2020年08月01日
问题如下：
Suppose a hypothesis test with a 5% significant level. What is the critical value of a z-statistic if it is a two-tailed test?
选项：
A.±1.65
B.±1.96.
C.+1.96
解释：
B is correct.
A two-tailed z-test at a 5% significant level means the critical value is z=-1.96 or z=+1.96.
请问如果是单尾检验，critical value是正负还是只有一个？
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
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
这一题B C 答案一样
