Comparing mortality/survival rate among treatments
Sep 10, 2020 11:49 AM(170 views)
What is the best method to analyze percent mortality or percent survival (100-mortality) data? I am providing a mock data set. I place 20 animals in a cage and at the end of the study I count the number of live animals and the difference from 20 is the dead animals. The experimental design is a complete randomize block design and I want to use block as either a random effect, covariable, or other suggestion. Time of death is no important and thus I'm struggling to use the JMP survival tools. I want to know if there is a statistical difference in mortality or survival rate (as a percent) among the 3 treatments. If I calculate by hand survival_% is: Control=97%, Drug=88%, Placebo=79.5%; and thus mortality_% is: Control=3%, Drug=12%, Placebo=20.5%.
Please provide step-by-step instructions (e.g., Analyze > Fit Model > etc.) or pictures.
@markbailey thank you for the suggestion. Unfortunately it does not work, I have tried the binomial distribution with not successful results; it does not accept a random variable or covariable. Please try to use the mock data set I provided to see if you can find a suggestion. Cheers,