Saturday, October 22, 2011

Wednesday, October 19, 2011

Google Analytics Consulting Service

We are pleased to announce that SAS Data Guru has started to offer Google Analytics Services to the public.

Services include:

1. Set up Google Analytics
2. Tutorial on Report Utlization
3. Search Engine Optimization
4. Channel Marketing Campaign
5. HTML Customization for Advanced Features

Click here to contact us.

Please contact us at for more details.

Saturday, October 8, 2011

Key Steps for Doing Multiple Regression

1. Build Model Using R2 or Forwarding Method
2. Check Residual Plot
3. Check Multicollinearity

Sunday, October 2, 2011

Busting Loose From The Money Game

Dear readers, if you learn SAS because you want to make more money in your life, please pause and take a look at this book:

Busting Loose From the Money Game: Mind-Blowing Strategies for Changing the Rules of a Game You Can't Win by Robert Scheinfeld

Saturday, October 1, 2011

What is Longitudinal Study?

"Longitudinal studies are defined as studies in which the outcome variable is repeatedly measured; i.e. the outcome variable is measured in the same individual on several different occasions. In longitudinal studies the observations of one individual over time are not independent of each other, and therefore it is necessary to apply special statistical techniques, which take into account the fact that the repeated observations of each individual are correlated. The definition of longitudinal studies(used in this book) implicates that statistical techniques like survival analyses are beyond the scope of this book. Those techniques basically are not longitudinal data analysis techniques because (in general) the outcome variable is an irreversible endpoint and therefore strictly speaking is only measured at one occasion. After the occurrence of an event no more observations are carried out on that particular subject."

Excerpt from Applied Longitudinal Data Analysis for Epidemiology, A Practical Guide by Jos W. R. Twisk