Recent content by Dason

  1. Dason

    Monty Hall extended

    I think you would need to define what would happen in the situation that the door to the car is chosen
  2. Dason

    Is this possible?

    I don't really understand what your actual question means here. What would it mean for the frequency in a bin to be different than "the mean"? What exactly is "the mean" referring to here? The average frequency? Would that really be all that interesting to know? I think the better thing to...
  3. Dason

    Why is there n-1 degrees of freedom and not n-2 (student distribution)

    So you're fine with there being no mention of degrees of freedom in a Z test even though we estimate the mean in the process?
  4. Dason

    Urgent help in Statistics !!!

    Collect some data, visualize it, create a hypothesis, and then test that hypothesize using a model of some sort. Sounds like a good project to me.
  5. Dason

    Why is there n-1 degrees of freedom and not n-2 (student distribution)

    To provide a counter point to your assertion that what you're describing should remove another degree of freedom: why?
  6. Dason

    Why is there n-1 degrees of freedom and not n-2 (student distribution)

    The estimate of the sample mean is required before estimating the sample variance. So the number of parameters you need to estimate before you actually have enough information to estimate the variance is the number that is important for the degrees of freedom for the variance. Go ahead and...
  7. Dason

    Why is there n-1 degrees of freedom and not n-2 (student distribution)

    There is only one parameter that needs to be estimated before you calculate the sample variance
  8. Dason

    Bayesian probability problem

    Can you write out what those numbers represent. Like what formula are you plugging numbers into.
  9. Dason

    Bayesian probability problem

    Can you show how you would calculate the probability when picking just one coin?
  10. Dason

    Bayesian probability problem

    Can you show how you would calculate the probability when picking just one coin?
  11. Dason

    Fisher Matrix and Parameter Confidence Interval

    To answer question 1) for typical frequentists analysis the intervals 'typically' rely on asymptotics so what you're suggesting is essentially correct (you would want the standard error instead of the variance) For question 2 that would be the variance of the sum - not the variance of the...
  12. Dason

    Standard Normal and T-Distribution

    I didn't read the attachment but this quote is about as correct as saying "if x=10 then x also equals 11"
  13. Dason

    Bootstrapping in SAS

    Have you heard of boosting?
  14. Dason

    R^2 and r^2 in multivariate regression to exponential function

    Their previous post which is now deleted did mention the caveat that it only holds when the predictors are uncorrelated. In which case I believe it's a true statement. But that certainly wouldn't hold for the specific nonlinear case mentioned.