Wen Wang

5 Questions 24 Answers 0 Followers

Questions related from Wen Wang

How does one deal with the perfect prediction problem during bootstrapping logistic regression model?

The logistic regression algorithm worked very well on my original data. However when I tried to use bootstrapping to evaluate the confidence interval for the deviance test p value, the logistic...

07 July 2014 1,282 10 View

When deleterious mutations happen, how does our genetic system work to protect us?

DNA repair can identify and correct damage to the DNA molecules that encode its genome. Then what does our genetic system do when a bad mutation happens? Since mutation can't be fixed, is it...

02 February 2013 5,447 4 View

Permutation-based statistical tests for multiple hypotheses, one-tailed test vs two-tailed test?

The multiple hypotheses I was testing can use two one-tailed tests (test two directions separately) or one two-tailed test. And I'm using false discovery rate (FDR) to control type I error. For...

02 February 2013 2,145 7 View

A probability problem

Suppose I have 100 balls in a box and 10 of them are red. If I randomly take out 40 of them, what is the probability that I can get at least 6 red balls? How is this worked out?

08 August 2012 1,911 5 View

Is there an efficient way to compute the joint cumulative distribution function for discrete variables?

For example, I have 20 balls in a bag, 7 of them a red, 4 of them are blue, 5 of them are yellow, 4 of them are black. If I randomly pick 10 balls, I want to find the possibility that I got at...

08 August 2012 4,701 3 View