J Test, Regression, Model Selection, Statistics, Deep Dives.
between the number of parameters between the two models. In our case, this difference is (k_d — k_a)=(9–8)=1. Let’s calculate the test statistic and compare its value with the critical Chi-squared(1) value at α of .05: #Get the maximumed log likelihoods of models A and D log_ll_a =