Mario Garrido

5 Questions 7 Answers 0 Followers

Questions related from Mario Garrido

How to test for intercept differences when slopes are different? has any sense to do it?

Dear RGaters, I ran the following regression Final weight~treatment+Initial weight+treatment:Initial weight where treatment is a binary variable (treated vs. untreated animals) The interaction...

12 December 2017 794 1 View

What is the best method to analysis of longitudinal data in epidemiology?

Hi, I have infestation of dynamics of two different groups of hosts. Total of 20 points of measurement per individual, 10 individuals per group. I want to compare the dynamics of the 2 groups over...

11 November 2017 1,954 9 View

Keeping the lower order effects in a model

Good morning, It seems to be assumed that we should "always leave in any lower order terms, significant or not, for any higher order terms in the model. That means you have to leave in all...

07 July 2017 1,569 23 View

How to rank the relative importance of predictors in Multimodel inference (Burnham & Anderson)?

Hi, I want to know how to rank the relative importance of predictors calculated by summing the Akaike weights of the different models where they are included. I just find a comment at this respect...

09 September 2016 7,346 4 View

What is a test for the homogeneity of slopes before running an ANCOVA? What is the meaning of an interaction term in R?

I have some doubts in how to interpret the interaction term in an ANCOVA using R since in other statistical programs this term is not provided. If I am right, one assumption of ANCOVA is the...

12 December 2015 6,898 11 View