sampling with replacement

  1. P

    Sampling with replacement- or slightly different?

    Hi, I'm looking for a probability distribution that describes a problem I have. If I have a bag of blank paper slips of number N. I choose one at random If it is blank I colour it red and replace. If it is already coloured I just replace it. How form does the number of red slips (n) as a...
  2. M

    Resampling with replacement

    Hey @all, I have a lack of understanding for the following task.. For given random variables X=(X_0,X_1,..X_M) I have M samples x^i_0. The Markov chain (MxM Matrix) describes the probability distribution for each of the random variable concerning the samples,that is P(X^j_0=x^i_0)=p_{ij}...
  3. U

    proper sample size and number of estimation for comparing two predictors' AUCs

    Hello, I am trying to do classification of patients by using different predictors. I want to do bootstrapping for a number of times so that I can come up with a set of Area Under Curve's (AUCs) of ROC curve for each predictor and then compare their effectiveness in classification by...
  4. A

    Sampling distribution

    Hi, I have to calculate mean and standard deviation of sample means of size 30 (with replacement) from a population of size 87. Its impossible to do it without the help of any software because N^n is 87^30. I tried to get this distribution by using SPSS but it only generates random...