Are these categories nominal or ordinal in nature?
If nominal try Fleiss' Kappa. If ordinal, use Kendall rank correlation coefficient.
A minimum of 50 samples
Pick a policy, then select samples that both pass the policy and fail the policy
I thought I would throw this in from a course I teach in problem solving. There should be some overlap in statistics.
Three rules of causality:
A correlation or association exists between the hypothesized cause and the effect
Cause must precede effect in time
The mechanism linking cause to...
It appears there are 4 major groupings. Would it make sense to perform a cluster analysis of the HCPCS codes into 4 clusters then treat these clusters as an indicator variable in your regression? Would the results be interpretable?
Each clustering method has its own set of strengths, weaknesses, and tendencies. Wards method tends to form clusters with similar numbers in each cluster. This may or may not make sense in your particular situation. Regarding the number of clusters, this is a judgment call. You can visually...