PowerAnalyses.org Beta
Test family:
Exact
F tests
t tests
χ² tests
z tests
Statistical test:
ANCOVA - Fixed effects, main effects, and interactions
Type of power analysis:
Compute required sample size (a priori)
Compute required α (criterion)
Compute achieved power (post hoc)
Compute required effect size (sensitivity)
Tail:
One tail
Two tails
Sample size:
α err prob:
Power (1-β err prob):
Effect size:
Reset
Calculate
Why this web site?
Statistical power analyses play a key role in science. However, the code for these tools isn't always public. This project shares the code along with the tool, so that people can verify the code and improve it.
PowerAnalyses.org Beta