Answer:
The number of degrees of freedom and the right-hand tail area α.
Explanation:
Chi Square Distribution
α is Significance level
If the p-value of hypothesis test < α , then we reject null hypothesis of the test.
So, α is basically a critical p-value which makes a rejection region in the right tail
Now, the statistic χ 2 also depends on the degrees of freedom
So, The value of χ2α in a particular situation depends on
the number of degrees of freedom and the right-hand tail area α.