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math.chi-square-goodness-of-fit Calculator
Performs chi-square goodness-of-fit test with degrees of freedom correction and interpretation of the test result at standard significance levels. The degrees of freedom equals the number of categories minus 1 (minus estimated parameters).
Inputs
Observed 1
Reference formula or conversion factor shown for context.
Expected 1
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Observed 2
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Expected 2
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Observed 3
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Expected 3
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Results
chi-square statistic
Chi-squared statistic for testing goodness of fit or independence. Compare to critical chi-squared for your degrees of freedom.
degrees of freedom
The magnitude or severity on the applicable scale.
critical value (α=0.05)
The threshold the test statistic must exceed to reject the null hypothesis at the chosen significance level.
significant?
Sample size or count used in the calculation.
χ² = Σ(O-E)²/E
Reference formula or conversion factor shown for context.