[R] When normality test violate and sample size is large(n=400) can I use t-test

Dears  When normality test  violate and sample size is large(n=400) can I use t-test? best gards kourosh [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do

[R] programing for partial maximum likelihood for cox models with two covariate

dears, I like two write a program with R to estimate the coefficients of covariate,I like two know the original program for this programing for partial maximum likelihood for cox models with two co variate. I did it with coxph command, thanks [[alternative HTML version