Question

The null hypothesis regarding a contingency table with 6 rows and 4 columns should be rejected (at 95% confidence) if the test statistic is greater than

Answer 1

Degrees of freedom: $df=(c-1)(r-1)=(4-1)(6-1)=15.$

For $\alpha=0.05, \;df=15:\chi^2_{crit}=24.996.$

The null hypothesis regarding a contingency table should be rejected (at 95% confidence) if the test statistic is greater than 24.996.