Re: [R] Linear regression with tranformed dependant variable

2017-10-24 Thread Michael Friendly
Step back a minute: normality is NOT required for predictors in a multiple regression model, though the sqrt(x) transformation may also make the relationship more nearly linear, and linearity IS assumed when you fit a simple model such as y ~ x + w + z. (Normality is only required for the

Re: [R] Linear regression with tranformed dependant variable

2017-10-23 Thread John C Frain
Before going to stackexchange you should consider if a square root transformation is appropriate for the model that you are trying to estimate. If you do so, you may be able to interpret the coefficients yourself. If no explanation is obvious you probably should not be using a square root

Re: [R] Linear regression with tranformed dependant variable

2017-10-23 Thread Rui Barradas
Hello, R-Help answers questions on R code, your question is about statistics. You should try posting the question to https://stats.stackexchange.com/ Hope this helps, Rui Barradas Em 23-10-2017 18:54, kende jan via R-help escreveu: Dear all, I am trying to fit a multiple linear regression

[R] Linear regression with tranformed dependant variable

2017-10-23 Thread kende jan via R-help
Dear all, I am trying to fit a multiple linear regression model with a transformed dependant variable (the normality assumption was not verified...).  I have realised a sqrt(variable) transformation... The results are great, but I don't know how to interprete the beta coefficients... Is it