Re: [R] Varying statistical significance in estimates of linear model

2013-08-09 Thread Stathis Kamperis
For archiving reasons: 1. Practical Regression and Anova using R by Faraway 2. Possible reason: multi-collinearity in predictor variables. Thanks everybody! On Thu, Aug 8, 2013 at 1:43 PM, Stathis Kamperis ekamp...@gmail.com wrote: Hi everyone, I have a response variable 'y' and several

[R] Varying statistical significance in estimates of linear model

2013-08-08 Thread Stathis Kamperis
Hi everyone, I have a response variable 'y' and several predictor variables 'x_i'. I start with a linear model: m1 - lm(y ~ x1); summary(m1) and I get a statistically significant estimate for 'x1'. Then, I modify my model as: m2 - lm(y ~ x1 + x2); summary(m2) At this moment, the estimate for

Re: [R] Varying statistical significance in estimates of linear model

2013-08-08 Thread ONKELINX, Thierry
of data. ~ John Tukey -Oorspronkelijk bericht- Van: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] Namens Stathis Kamperis Verzonden: donderdag 8 augustus 2013 12:43 Aan: r-help@r-project.org Onderwerp: [R] Varying statistical significance in estimates of linear model Hi

Re: [R] Varying statistical significance in estimates of linear model

2013-08-08 Thread Bert Gunter
Stathis: 1. This has nothing to do with R. Post on a statistics list, like stats.stackexchange.com 2. Read a basic regression/linear models text. You need to educate yourself. -- Bert On Thu, Aug 8, 2013 at 3:43 AM, Stathis Kamperis ekamp...@gmail.com wrote: Hi everyone, I have a response