how to test for monotonic relationships what is the least robust way to test the monotonic relationship between two variables? what kind of model would be used to test a monotonic relationship between two variables? how to measure monotonic relationship of 2 variables how to test for monotonic relationship of a variable how to test for monotony between variables what is the most robust way to test for monotonic relation between two variables? how to test monotonic relationships how to test for monotonic relationship what model to use for monotonic relationship test the relationship between two untransformed variables without a specific functional model. what is a method used to test monotonous relationships between two variables? how to test for monotonic relationships how to test monotonic relationship between two variables how to test for monotonic relationship what is monotonic relationship test what is the best way to test a monotonic relationship which type of model would test the relationship between a variable and a functional model? what is the best way to test a monotonic relationship how to test for a monotonic relationship between two variables, without assuming a specific functional model?