what are chunk tests what is a chunk test why do chunk tests work what is a chunk test for what is a chunk test what is a chunk test what is the chunk test what is a chunk test what kind of tests are run for a variable define chunk testing what is chunk tests what is a chunk test example what are chunk tests why are chunk tests important what is the chunk test in multicollinearity what is chunk test for what is chunk test in a model what is chunk test in statistics why is it so important to use chunk tests what is chunk test