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  1. lucyd123

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

    I do have the tree height. However, all the trees were pollarded to 2 m about 6 months prior to the experiment.
  2. lucyd123

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

    Great question! This research question doesn't have anything to do with cows. it's all about which of the following non-destructive measurements can be used to estimate total biomass of the tree, for example: RCD, the diameter of the tree at the base. Ok Thank you for the advice I will try with...
  3. 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...
  4. lucyd123

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

    LOVE THIS! Also, I'm totally up for this! Where do I send all the cakes to!?
  5. lucyd123

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

    Ok thanks! Well i'm broke anyway so you're saving me taking out another loan! Yes some of my other posts were related to a different question! Ok well I've made a few models, and if anyone can help me decide which model they would pick and why you would be literally saving my PhD. Thank you...
  6. lucyd123

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

    I think this is the closest paper to explaining what it is I need to achieve!
  7. lucyd123

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

    Here is an example of the datset https://drive.google.com/file/d/1G00HXF4hj6_Ka9_T4Izo5sAsPaEzwkZq/view?usp=sharing
  8. 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...
  9. 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...
  10. lucyd123

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

    I've bumped this because I've changed the question!
  11. lucyd123

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

    Also: Thank you for all this amazing advice and insight. There is a lot here that had never even occurred to me! Best wishes, L
  12. lucyd123

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

    Thank you for this observation. Actually this is an error in the data entry, where the person entering the data from my notes confused a 0 with not putting anything into the excel sheet! All parameters were measured (I measured them).
  13. lucyd123

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

    Wow ok, so it sounds like it is dependent on many factors. In the attached document I have tried first non parametric and then square root transformation followed by parametric testing on the same dataset. Sounds like there is not a right or wrong answer!
  14. 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...
  15. 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...
  16. lucyd123

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

    I totally agree about reducing the chances of errors, I'll look into it there's a chance I have an institutional subscription... Hopefully the institution can come in handy for something
  17. lucyd123

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

    wow! Whatever you're using beats R I'm pretty suspicious of this mood.test code. Can you tell me which program this is? Best wishes!
  18. lucyd123

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

    What's wrong with all these file extensions? Does this work?
  19. lucyd123

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

    It won't let me attach it here but I've uploaded it to my Google Drive, link is https://drive.google.com/file/d/1fmbaT2s9ScHy03l115nuAQezDw3NgooP/view?usp=sharing It's the DW_H_T column and the PRE and POST data is in the PREPOST column. Thank you so much!!
  20. lucyd123

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

    It looks so different! Part of the problem is the cows totally trashed this species. I want to keep the 0 values as they are legitimate (there was a tree, but it has been destroyed by cattle, but the significance of this result is not coming across in the Mood's test, (could this be the 0's?)...