I have a simple question. I wanted to compare two independent survival curves, for example
Online resources tell me that the Mann-Whitney test can be used to test two independent groups or ordinal data.
My question is do I feed the test (1) the actual survival curves as seen on the picture, or (2) do I random sample the survival PMF and feed the random samples to the test?
My guess would be number (2) but the word ordinal confuses me.
There is no censoring - the image is just an example of two curves. Sorry for the confusion. Also - the curves are predicted so I don’t have exclusive events - that is the reason why I want to sample from the pmfs.
If sampling is the correct approach - do I have to order the event times before I input them in the test?