Recent content by Dason

  1. Dason

    Generalization of urn problem

    It might be directly solvable but it seems a bit too complex and calculations using simulation would be a lot easier to produce.
  2. Dason

    Quadratic polynomial - how to test correlation between x and y?

    "I would like to test the correlation between these two variables" Let's take a step back. Why do you want to test the correlation? What is it that you're hoping to show? That the variables are related? What is your research question here?
  3. Dason

    Analyzing grades

    I sent you a PM with contact info if you want to send your data over.
  4. Dason

    Analyzing grades

    It sounds like you just want a pivot table. They are easy to make in Excel.
  5. Dason

    Analyzing grades

    You don't show your data but it sounds like you just want a pivot table
  6. Dason

    Normal Distribution of multiple Std.Dev´s and Means

    I think you'll need to describe what you have and what you actually want to do and why a bit more.
  7. Dason

    is regression analysis possible for this dataset?

    Well how bad is the bias? What is your goal? If the goal is to get good predictions then a model being unbiased might actually hurt if it increases your variance enough.
  8. Dason

    is regression analysis possible for this dataset?

    https://en.wikipedia.org/wiki/All_models_are_wrong
  9. Dason

    is regression analysis possible for this dataset?

    That's all well and good but I think everybody is sidetracked on the (in my opinion) irrelevant discussion on sample size. They posted a sample/example of their data which wasn't intended to be the full dataset (at least for the data on the left) as far as I could tell. @GAL Can you provide...
  10. Dason

    Reporting ANCOVA results. - Where are Between/Within Groups dF's?

    Don't get me wrong. I'm sure the degrees of freedom match up - but how you are getting them probably doesn't correspond to the test that you were referring to in the original post.
  11. Dason

    Reporting ANCOVA results. - Where are Between/Within Groups dF's?

    That doesn't sound right
  12. Dason

    time series regression

    Do we have evidence that they're a wonderful group? What's the p-value on that?
  13. Dason

    time series regression

    Things
  14. Dason

    time series regression

    It depends.
  15. Dason

    time series regression

    To respond to your first post - the point being made was that if you're doing something like stepwise selection it is dubious to look at the raw p-value for the predictors in the final model that you select.