Chi-Square Calculator
Calculate chi-square test statistic
Formula
χ² = Σ(O-E)²/E
Chi-square tests if observed frequencies differ from expected.
Examples
O: 30,20 vs E: 25,25
χ² = 2.0, not significant at α=0.05.
Frequently Asked Questions
About Chi-Square
Calculate chi-square test statistic for goodness of fit.
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