has_specified_output achieves_planned_objective statistical hypothesis test statistical hypothesis test objective data transformation survival analysis objective survival analysis data transformation log-rank test Philippe Rocca-Serra The logrank test is a statistical hypothesis test used to compare the survival distributions of two or more groups. It is commonly employed in survival analysis, where the primary interest lies in comparing the survival experiences of different groups over time. adapted from wikipedia: https://en.wikipedia.org/wiki/Logrank_test AND adapted from ChatGPT3.5 with the following prompt: "Please define 'logrank Test' in statistics" Mantel-Cox test logrank test p-value ready for release