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Threads 3181 to 3192 of 3192

# Forum: Statistical Research

Statistical theory and methodology. Mathematical statistics. Parametric inference. Nonparametric inference.

1. ### Sticky: Proof of the day

In this thread we post one (or more if you can't wait) proof a day. I'll start by proving the that V=\sigma^2(X'X)^{-1} in the linear...

• Replies: 14
• Views: 18,625
10-11-2014, 12:02 PM
1. ### about random walk Metropolis algorithm

Our model is: Y is distributed from a Negative binomial(r,p) where log(p/1-p)=xb. The prior of b is a multivariate normal(mu0,...

• Replies: 3
• Views: 2,172
01-06-2013, 07:50 PM
2. ### bridge estimation in linear regression

So the bridge estimates, \beta (which is a vector of \beta_1,...,\beta_p), minimize \sum_{i=1}^n (y_i - x_i^T\beta)^2 +...

• Replies: 0
• Views: 2,303
11-25-2010, 11:53 PM
3. ### number of distinct samples in sampling with replacement

If I have a set (X1, X2,X3) and I want to re-sample them with replacement, the possible combinations of the samples are (the order doesn't matter):...

• Replies: 0
• Views: 3,587
02-01-2011, 06:58 PM
4. ### interval censored data using bootstrap method

I have time Xi that is interval censored and the data consist of time intervals Ii = such that Xi is within Ii , Ri>Li, i=1,...,96 My interest is...

• Replies: 2
• Views: 4,826
03-29-2011, 09:09 PM
5. ### nonparametric estimate the distribution with a histogram only

Suppose X1,.., Xn ~iid F with mean mu_F The data is summarized in a histogram and that is all I have. I don't have the individual Xi (i = 1,...,n)....

• Replies: 3
• Views: 3,054
BGM
03-24-2011, 11:47 PM
6. ### bias of the coefficient of variation

Is the coefficient of variation biased? How would you compute the bias of CV? Can I write E(sigma_hat/|mu_hat|) = E(sigma_hat)E(1/|mu_hat|)+ ...

• Replies: 4
• Views: 5,648
03-30-2011, 02:38 PM
7. ### EM Algorithm for Gaussian Mixture model fitting data with missing values

I have an EM function that will take regular data with no missing values, and compute means, standard deviations, and probabilities of components of...

• Replies: 1
• Views: 4,350
04-12-2011, 11:26 AM
8. ### Gpower

I'm wanting to run a study where I record motor evoked potentials evoked from a group of participants they view images of people performing reach and...

• Replies: 2
• Views: 5,082
01-11-2011, 08:28 AM
9. ### Variance estimation

A simple question we have a random sample n=2 with X, Y drawn from a normal distribution N~(0, \sigma^2). Is V=\frac{X^2}{2}+\frac{Y^2}{2} a...

• Replies: 21
• Views: 6,422
11-01-2010, 06:42 AM
10. ### Linear estimator of mean

Problem is solved! :)

• Replies: 0
• Views: 1,840
11-03-2010, 05:19 AM
11. ### Project ideas

Hello guys and girls, In our coursework programme we will be asked to complete 2 industry projects each 25-30 pages long. There is a great number...

• Replies: 0
• Views: 4,600
11-28-2010, 06:07 AM
12. ### Algebra, two-sample t-statistic, variance

• Replies: 20
• Views: 5,717
08-13-2012, 12:31 AM

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