Page 6 - Considering Sample Size Flashcards
1
Q
Power refers to …
A
Probability of rejecting the null hypothesis
2
Q
What are the three types of Power Analysis?
A
A-priori
Post -hoc
Compromise
3
Q
A priori
A
Before study takes place
Estimate best sample sized based on ‘a level’
Desured power level (1-b), and size of the effect
Controls for both type 1 and type 2 errors
4
Q
Post - hoc
A
After study takes place
Already know outcome, but want to check if actual significant difference
Already known sample (N), the set a level, and specificed effect size (1-b) associated with the test
Only controls for a and not b
5
Q
G- Power
A
Program to determine power analysis
t-test, anova, regression models and other study designs
