log rank

  1. R

    Testing for hypergeometric distribution assumption in log rank test

    Hi, When using log rank test, there is assumption made on the observations of subjects having reached intended event to be hypergeometric. Is there a way to test this assumption whether it holds true or not and how can this test be done in R or Python given a dataset that has the subjects from...
  2. R

    Survival analysis at few dates: glms? logrank? cox ?

    Hello, In many documentation I have read that Kaplan-Meier curves followed by logrank test and/or cox models are the most recommended statistical methods to analyse Survival and test for different factors that may impact the Survival. However, I have also heard that these are suitable if I...
  3. D

    Kaplan Meier and Log Rank

    Hi all, I am doing cognitive testing and the subjects have 20 possible trials to reach criterion (90% accuracy). In my spreadsheet, I have it laid out as Column1: treatment group, column2: trials to reach criterion, Column3: status(whether or not they reached criterion). Is it appropriate to...