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  1. Dason

    Share your functions & code

    This wasn't really a TIL but it's also RStudio specific. But there are a few examples of some helpful snippets you could include in RStudio to make your life easier - I'm too lazy to list them out so check out the blog posting
  2. Dason

    Granular p-values

    What context are you seeing this be discussed
  3. Dason

    'relative difference' as dependent variable

    What does the originally data look like? Do you have access to the original data?
  4. Dason

    Approximate 95% confidence interval- Practice exam question

    I think C would be the typical answer if not for the word "approximate". That alone makes me think they want them to use 2 instead of the slightly more exact 1.96 when constructing the interval and in using 2 that does lead to (D).
  5. Dason

    Skewness coefficients

    I don't understand - if you're fitting with a normal distribution then there isn't any skew being modeled.
  6. Dason

    Please help with the following question

    Not quite. What are you using for the distribution of the sum
  7. Dason

    Please help with the following question

    Do you know how to find the distribution of the sum of normally distributed random variables
  8. Dason

    Please help with the following question

    Hint: start by using the info provided to figure out the standard deviation for one link
  9. Dason

    Summing number of "successes" over multiple related binary variables for a patient

    For ten variables? Probably just easiest to treat each one on a case by case basis
  10. Dason

    Can you help me with this question

    I'm not so sure about that. But that's partially because the original post is hard to follow. From the description it seems like multinomial might be more appropriate?
  11. Dason

    Is the mean of a kernel density estimator a valid estimator of the population mean?

    Is the kernel symmetric and identical (other than location) for all points?
  12. Dason

    question about correlation

    I think you're extremely misinterpreting what the correlation coefficient tells you
  13. Dason

    Can I use a Poisson distribution for non-normal binomial data?

    I think you're confused on the rules of thumb. The binomial can be used in any case where it's appropriate. The normal approximation is typically assumed to be 'good enough' if p*n > 5 and (1-p)*n > 5. That is what you were checking so the normal distribution approximation to the binomial...
  14. Dason


    Yeah that's easy to do. Mapping actual addresses is a bit more challenging though
  15. Dason


    How many addresses do you need to do this for
  16. Dason

    Paired Samples t test

    Do you have the number of sentences looked at for each child
  17. Dason

    Heterodastic thread on heteroskedasticity

    I didn't look too much into it but if your data is arranged such that observations in the same group are in consecutive rows then serial correlation being detected makes sense since consecutive rows share a common random effect.
  18. Dason

    Finding Standard Deviation in a binomial distribution : Help Please

    If you can calculate the expected value can you figure out the success probability (p)?
  19. Dason

    Results interpretation 3 or more dummy variable

    If you're only getting a single coefficient for your variables then you're doing it wrong