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This tag is too general; please provide a more specific tag. For questions about the properties of specific estimators, use [estimators] tag instead.

3
votes
For REML under fixed effects the variance estimator equivalent to $S^2=\frac{\sum_{i=1}^n (y_i - x_i \hat{\beta})^2}{n-p}$ where $\hat{\beta}$ is the OLS estimator, but as a bonus with OLS you also ge …
answered May 4 '15 by Jonathan Lisic
4
votes
You might want to try to simplify $np-p+p^2-np^2$. Maybe factor out $n-1$ and $1-p$. I didn't check your final answer, but it might be correct, just less-pretty. As a hint $c$ should not be a funct …
answered Oct 7 '14 by Jonathan Lisic
4
votes
This is a quick example in R for taking a 5x5 positive definite matrix and turning it into an approximation of the first matrix. #Test Matrix A <- matrix(1,nrow=5,ncol=5) diag(A) <- 1:5 evec <- eige …
answered Sep 22 '11 by Jonathan Lisic
9
votes
In statistics there really is no concept of a 'right' estimate, it's just if the estimate you construct has the properties that you are looking for. Typically if you are trying to estimate a CDF, you …
answered Sep 22 '11 by Jonathan Lisic