The area to the right of a chi-squared value is 0.01. For 8 degrees of freedom, the table value is 20.0902.

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For a chi-squared distribution with 8 degrees of freedom, a table or calculator will show that the critical value corresponding to an area (or p-value) of 0.01 to the right (in the upper tail) is indeed 20.0902. This means that if the chi-squared statistic is greater than 20.0902, the result is in the top 1% of the distribution, indicating a very low probability (less than 0.01) that the observed distribution matches the expected distribution under the null hypothesis, assuming the null hypothesis is true.

The Area to the Right of a Chi-Squared Value Is