Statistical Power Calculation
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Power ( 1 - β) : ANOVA
This utility can be used to calculate statistical power gained with given sample size when your aim is to test whether more than two sample means are equal or otherwise. (Null hypothesis: All sample means are equal. Alternate hypothesis: At least two of the sample means are significantly different.
Method used and other details
Number of groups (k)
Required
Number of Groups / arms in your study.
Your Mean, SD and Sample Size in each group.
Group / Arm No
Mean
Standard Deviation
Sample Size Available
1
2
3
Mean, SD and available Sample Size in each group
Confidence Level %
Enter positive number between 0.01 to 99.99
Required
In percentage. Commonly used values are 95, 99 and 90. Should be between 0.01 to 99.99.
Power Achieved =
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