# Tagged Questions

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### Probability and Sampling distribution

Would you please explain me the difference between Probability distribution and Sampling distribution easily ? Is that the difference : in probability distribution we have probability for every ...
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### Estimating population size of a subgroup based on independent samples without replacement

Let a bag have 1000 balls, 100 red and 900 blue. Now, let us get ten independent samples (without replacement within each sample) of the original population (10% each). Proceed to count the number of ...
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### Gibbs sampling in document clustering

I'm trying to understand the idea behind the Topic Models in document clustering. In Latent Dirichlet Allocation, it is necessary to approximate the posterior distribution of topics over the document. ...
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### Sampling from marginal using integrated conditional

I would like to sample from: $$p(\theta_2|x)=\int p(\theta_2|\theta_1,x) . p(\theta_1|x) . d\theta_1$$ knowing that I can easily sample from $p(\theta_1|x)$ and (less easily) from ...
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### (interacting) MCMC for multimodal posterior

I am trying to sample from a posterior having many modes particularly far from each others using MCMC. It appears that in most cases, only one of these modes contains the 95% hpd I am looking for. I ...
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### Is it invalid to use a single sample to estimate more than one proportion?

Lets say that I have a jar of white, black and red marbles (1000 total) but I don't know the quantity of each colour. I now take a sample of 10 marbles from the jar which contains 3 x white, 4 x ...
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### Understanding F-test to compare variances (R's var.test)

I gave run the following codes in R console: ...
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### How to write a poker player using Bayes networks

This is my first question on stackexchange and also my first time implementing a Bayesian network so I will apologize ahead of time for any novice mistakes I make. The goal of my project is to ...
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### What if your random sample is clearly not representative?

What if you take a random sample and you can see it is clearly not representative, as in a recent question. For example, what if the population distribution is supposed to be symmetric around 0 and ...