Nonparametric Tests for Independence Between Lifetimes and Covariates from Censored Bivariate Normal Samples

Three run-based and two rank-based nonparametric tests are proposed for testing independence between lifetimes and covariates from censored bivariate normal samples. Simulated powers for the suggested nonparametric tests and the T-test based on the sample correlation coefficient are determined and compared for samples from the standard bivariate normal distribution for various sample sizes, proportions of censoring, and correlation values. To …