Recap previous courses

Question 1

What are the steps of a power analysis?

Answer 1

1. determine zcv for H0.
2. determine xcv for H0.
3. convert xcv to zcv for H1.
4. power equals P(Z> Zh1 I h1).

Question 2

Which factors influence power?

Answer 2

1. sample size.
2. alpha level.
3. standard deviation.
4. true mean of h1.

Question 3

What are the measures for effect size?

Answer 3

1. cohen’s d: 0.2, 0.5, 0,8.

2. r-square: 0.01, 0.06, 0.14.