[R] Non-normal data issues in PhD software engineering experiment

2008-07-10 Thread andrewjacksonTCD
Hi All, Title: Non-normal data issues in PhD software engineering experiment I hope I am not breeching any terms of this forum by this rather general post. There are very R specific elements to this rather long posting. I will do my best to clearly explain my experiment, goals and problems here

Re: [R] Non-normal data issues in PhD software engineering experiment

2008-07-10 Thread hadley wickham
On Thu, Jul 10, 2008 at 11:06 AM, Daniel Malter <[EMAIL PROTECTED]> wrote: > > I hope you don't really want our patients :) > > It looks that you have an experiment with two groups. You have several > trials for each group. And within each trial you observe your units a > distinct points in time. >

Re: [R] Non-normal data issues in PhD software engineering experiment

2008-07-10 Thread Gustaf Rydevik
On Thu, Jul 10, 2008 at 5:15 PM, Andrew Jackson <[EMAIL PROTECTED]> wrote: > Hi All, > Hi Andrew, The main questions here are not R-related, but statistical modelling questions, and much too broad for the R list. They are things you'd ask a (paid) statistical consultant. I would suggest taking co

Re: [R] Non-normal data issues in PhD software engineering experiment

2008-07-10 Thread Daniel Malter
I hope you don't really want our patients :) It looks that you have an experiment with two groups. You have several trials for each group. And within each trial you observe your units a distinct points in time. The first advice for you is to graphically display your data. Before you start modeli

[R] Non-normal data issues in PhD software engineering experiment

2008-07-10 Thread Andrew Jackson
Hi All, This is a rather general post to begin with. This is because I need to provide you some important context. There are very R specific elements to this further along in this rather long posting so I thank you in advance for your patients. I will do my best to clearly explain my experiment,