Statistical Power Calculation
Statistical Power: Chi Square test- Goodness of fit
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This utility can be used to calculate statistical power gained with given sample size, when your aim is to test whether there is significant difference between given proportions and expected proportions. (Test of significance: Chi-Square test: Goodness of fit).
Method used and other details
Number of groups / levels in the group in your study (r)
Required
Should be > = 2.
Observed and expected values for each group / level in the group.
You can enter the observed values based on findings of your study. Also you can enter expected values for each of the observed value.
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 (1 - β) =
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