what is log rank test and wilcoxon test which test tests the proportional hazards assumption? what is the log rank test used for in a cox model what test to use if proportional hazards assumption how to test proportional hazards when is the wilcoxon test used test proportional hazards assumption what is the test for proportional hazards assumption can you test for proportional hazards assumption what test is used to test the proportionality of hazards assumption what is the log rank test and what do they test in the cox model what is proportional hazards which model can test proportional hazards assumption? when to use log rank test to test proportional hazards assumption what test is used to test proportional hazards assumption can you test a proportional hazards assumption test for proportional hazards in cox model which test can evaluate proportional hazards assumption what tests are used to test hazards theory what type of test is required for a proportional hazards assumption in a cox model