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Basic Question 9 of 9
If alpha equals 0.05 for a two-tailed hypothesis test, how large is the area of rejection in the upper or right tail?
B. 0.025
C. 0.975
A. 0.95
B. 0.025
C. 0.975
User Contributed Comments 3
| User | Comment |
|---|---|
| sharky7 | I'm getting sick with this topic... If alpha equals 0.05 for a two-tailed test, that means there are 0.025 in each side, wich means the rest of the area is 0.975. I thought this 0.975 area was supposed to be the area of rejection because the null hypothesis is falling within it, so it means to reject it!! Thank you for your help! |
| Shaan23 | The two tails are the area of rejection when Ho is actually true. So that is the rejection area |
| 35712850 | That means that in one tailed test it will be 0.05( +1.96) to be the area of rejection and in two tailed it be 0.05÷2 = 0.025(-1.96 to +1.96) in both sides to be the area of rejection |
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Learning Outcome Statements
explain hypothesis testing and its components, including statistical significance, Type I and Type II errors, and the power of a test
CFA® 2025 Level I Curriculum, Volume 1, Module 8.