Chi-Square Goodness of Fit Calculator
Test if observed frequencies match an expected distribution
About Goodness of Fit Test
The chi-square goodness of fit test determines whether observed frequencies match expected frequencies.
Null Hypothesis: Observed frequencies match expected distribution.
Effect Size (Cohen's w): 0.1 = small, 0.3 = medium, 0.5 = large
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.