# All Questions

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### Model estimation procedure by using Backward elimination

I have been run the multiple linear model by using minitab. the result showed that all variables are not significant. so, I use the method backward elimination. Lastly, I found that one variable is ...
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### Model specification

Actually I want to see the impact of Investors sentiment on Aggregate stock market return, so my major concern is to identify the impact of investors sentiment. But besides investors sentiment I want ...
6 views

### given mean and standard deviation, find value of given percentile

I'm running a DnD campaign and made a Random NPC generator in Excel. It's pretty slick, but the random height/weight calculator is... flat. RAND(X,Y) flat. So I'd like to add some Bell Curve ...
6 views

### Proper splitting of data set for Ensemble methods

I have 10,000 documents. Each document has a label ($Y$) that is either $0$ or $1$ (the 0-1 split is pretty much 50/50 over my 10,000 documents). Each document has 10 fields. Each field can have any ...
13 views

### Difference between arithmetic vs geometric random walk

I have read about arithmetic and geometric random walks. What is the difference between them?
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### Variance Estimation in case of nonrespondents

I saw in the book of Rubin (1987) that an increase in variance of estimation will occur due to nonresponses. But I wonder the reason behind this. Thanks for your shares!
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### categorizing monthly gross income

what is the best way to categorize or even bin monthly gross income? As of now, the variable for income is numeric and continuous. I have seen many examples for annual income. Should I categorize ...
8 views

### Multi-response GLMM in Jags

I have a data set with 8 response variables (all counts, they are 8 species of mammals). The responses are not independent, and I would like to measure the covariance between them (different ...
13 views

### Distribution for semi open interval

I have an application where I get back the time to perform an operation, the times are in the interval ]0:inf[ and I have this crazy idea. Lets say I know the mean ...
15 views

### How to transform data into discrete-time or time-to-event problem

I have a breast cancer dataset and my goal is to predict a patient's risk per time period using classifiers in WEKA. According to this thread about employment with a similar nature as to my problem, ...
16 views

### Help in Bayesian modeling with WinBUGS [on hold]

I am currently working on my thesis and interested in factor analysis for spatially correlated data using WinBUGS. I wrote the model but when am trying to use it ...
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### R-Cran Imbalanced data Smote problem [migrated]

I am using the following CRAN package DMwR to deal with the problem of imbalanced data : Code is the following: ...
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### Running a Tukey's test on a repeated measures ANOVA in R

I've come across several posts dealing with post hoc tests of Repeated Measurs ANOVA. I came up with the below code in R to attempt this, but considering some of the posts on this subject I wanted to ...
35 views

### Confused with this confidence interval statistics

The formula used to compute a confidence interval for the mean of a normal population when n is small is the following. What is the appropriate t critical value for each of the following ...