# Tagged Questions

SAS is a proprietary cross-platform general-purpose statistical software package. [Official Website](http://www.sas.com/index.html)

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### Estimated Survival Discrepancies: Kaplan-Meier vs an Extended Cox Regression

I have a massive data set of about 25000 pancreatic cancer patients; extremely quick and depressing mortality rate. I'm interested in survival differences between three groups--no treatment, ...
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### Determine which diseases cluster together (binary data)

How do I determine which diseases cluster together? I have a dataset with patients and their diseases. It's coded as HOHT = 1 if they have it, and HOHT = 0 if they do not have it. Below is an example ...
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### Testing simple slopes in multilevel modeling

I am currently working on a project where my coworker and I are examining the relationship between different aspects of friendship quality and achievement across three time points (grades 3, 5, and 6)....
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### Can I analyze planned missing (MNAR) data in unbalanced design using SAS PROC MIXED (Generalized LM)?

In my experiment, there are 3 levels of Treatment (A (control), B, and C). All participants (N=109) underwent two of these treatments, the order of which was determined by random assignment to 1 of 4 "...
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### SAS portable for 64 bit windows [closed]

SAS 9.1.3 portable version does not work on 64 bit operating system. Can anyone give me a suggestion about running SAS portable on 64 bit operating system? Thanks in advance.
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### Explanation of ROC data output in SAS Logistic Regression [closed]

I have run the logistic regression in SAS on binary data set available online. http://www.ats.ucla.edu/stat/data/binary.csv below is the sample output: ...
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### computation of square root of matrix

I am studying the Canonical correlation analysis(CCA) the formula https://en.wikipedia.org/wiki/Canonical_correlation is involving the -1/2 degree of a matrix. My question is: how can i do the ...
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### Statistical Analysis on Multiple Group data

I am new in statistical analysis field. I have a dataset which is divided into five groups each with four columns(common in all five groups). All these five groups have a baseline group to be ...
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### Hazard ratio with confindence interval for dummy variable

I have covariate Length which is 1 or 0, I'd like to get an estimate with confidence interval for hazard ratio of having an event when ...
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### good practice for cluster analysis [closed]

I want to find out what are the best practice in conducting a reliable cluster analysis: Outliers: Is it necessary or not to remove the outliers in the variables to be used for cluster analysis? ...
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### Use of weights in PROC GLIMMIX

I am looking to implement a generalised linear mixed model in SAS using PROC GLIMMIX. The data is from a survey, and a single ...
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### What is the method to find difference in mean of test and control population where data were collected for a marketing campaign?

What is the method to find difference in the response rate of test and control populations in SAS where data were collected for a marketing campaign? (10-20% were control, and the rest were the test ...
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### White test confirms heteroskedasticity while Breusch-Pagan test doesn't [duplicate]

I'm using SAS in order to create a model for a cars datasets. The response variable y, is the price of the car. By the way I'm using the PROC MODEL statement in order to check heteroskedasticity. This ...
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### In SAS' PROC LOGISTIC why aren't the coefficients consistent with the odds ratios?

Now before you point me to it, I've already read it: In PROC LOGISTIC why aren't the coefficients consistent with the odds ratios? Data used in this example accessed here as SPSS .sav; can be ...
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### Convert SAS syntax for mixed models for repeated measures in R

I want to attain a p-value in R using lme4 or nlme which has been obtained from mixed models (...
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### Convert SAS syntax for mixed models for repeated measures in R

I want to attain a p-value in R using lme4 or nlme which has been obtained from mixed models (...
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### Is there a minimum event rate required for the gradient boosting to work?

I am trying to run gradient boosting in enterprise miner on a dataset which has event rate of about 2% and sample size is about 1m. It fails to produce any output. Which makes me think, is there a ...
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### Could some one please explain the difference between Decay, Lag and Adstock?

I'm working on creating a market mix model and read that it is necessary to create additional variables to account for the lag and decay/adstock effect. Could someone explain how to create those ...
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### How to make a model for the given data in sas?

I have a nonlinear model: $$r10^{\beta_0-\beta_1A-\beta_2B-\beta_4D-\beta_{2,4}BD}$$. I used sas to test different models. Here is the code: ...
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### Using results from spline estimation in cox model

Is it possible to incorporate the results from estimating splines into a logistic or proportional hazards model? That is, I'd like to try to use the spline function as a weight for my exposure ...