Chi-Square Critical Value
Computes the critical value of the chi-square distribution for the degrees of freedom and confidence level you choose, dispensing with the printed table. It's the right-tail cutoff used in goodness-of-fit, independence and variance tests: if the computed statistic exceeds this value, the null hypothesis is rejected. Unlike the normal and the t, the chi-square is asymmetric and takes only positive values. Enter the degrees of freedom and the confidence level.
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Chi-Square Critical Value
Computes the critical value of the chi-square distribution for the degrees of freedom and confidence level you choose, dispensing with the printed table. It's the right-tail cutoff used in goodness-of-fit, independence and variance tests: if the computed statistic exceeds this value, the null hypothesis is rejected. Unlike the normal and the t, the chi-square is asymmetric and takes only positive values. Enter the degrees of freedom and the confidence level.
The chi-square cutoff, without a table
The chi-square distribution is the engine behind a whole set of tests: goodness-of-fit, independence, intervals for variance. In all of them, the decision depends on a right-tail cutoff, traditionally looked up in a printed table that lists only a few levels. This tool computes that critical value for any combination of degrees of freedom and confidence.
The chi-square has a peculiar shape: it takes only positive values and is asymmetric, with a stretched right tail. Its form depends on the degrees of freedom — with few, it concentrates near zero; with many, it grows more symmetric and approaches a normal. The critical value is the point that leaves, to its right, the probability corresponding to the significance level.
Enter the degrees of freedom and the confidence level. The tool returns the right-tail critical value. Compare your test's chi-square statistic with this number: if it exceeds it, you reject the null hypothesis at that level. It's the exact complement of the table that usually closes statistics books.
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The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.