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  1. lucyd123

    Model Dillema! Linear/Robust regression games

    Hi all! I have a great game, it's called, which model would you pick and why? You can play FREE RIGHT NOW by viewing the PDF. Also, what else can you suggest? The data in question is the relationship between the root collar diameter (diameter at the base of a tree) and the total biomass of...
  2. lucyd123

    Anyone here can mentor me on regression stats (paid)?

    Hi! I'm a UK based fourth year PhD student, my supervisor has suffered a stroke and I have about a month left to hand in. The good news is I have a fascinating data set. In particular I need some help understanding model selection, and all the caveats that go along with it. I'm not a stats...
  3. lucyd123

    Biomass Regression Equations, some questions

    Hi all! Thanks to everyone who contributes here it has been so much help so far, this forum is full of useful advice. I have some questions with regards to biomass equations, also loosely termed allometric equations. I am looking for relationships between : - Total biomass (dependent) and RCD...
  4. lucyd123

    RESOLVED but still open for discussion: When to transform and when to use non-parametric tests?

    Hi Amazing Forum of wonderfully statistically minded people. I recently did some statistical analyses on cattle trials, and was considerably helped by this forum. I used non parametric testing for non normal data. However, my supervisor says (as a rule) it's better to transform data and use...
  5. lucyd123

    Sample size in proportional tests (prop.test/other suggestions that can include sample size)?

    Can I just say a big thank you to everyone on this forum for patiently contributing to my limited knowledge of statistics and holding up a light in the otherwise total darkness I experience with this subject. This question relates to the weight of leaves on a sample of 90 trees measured prior...
  6. lucyd123

    RESOLVED: (Thanks Miner!) Best test? Before and After Cattle Trial

    Hi all! Love this forum. Sorry I'm such a rookie. So let's say I have 200 trees and I want to measure the impact of cattle on the trees. I cut down 100 trees prior to the trial and record the biomass of components. I cut down 100 trees after the trial and record the biomass of the...