Tuesday 5 June 2012

Logistic Regression

You may know the joke:  "There are just 10 types of people - those who understand binary and those who don't." 

Logistic regression (modeling 0/1 data) has become a ubiquitous technique, particularly since the rise of "big data" analytics and businesses' need for classification models (purchase or not, click or not, repay loan or not, etc.). 0/1 (yes/no) data ("same/different," "occur/don't occur," ...) are ubiquitous and modeling them is the province of logistic regression.  Like many important ideas in statistics, logistic regression did not become practical until the advent of computing power and availability.  Learn all about it in Joseph Hilbe's online course, "Logistic Regression“. For more details please visit at http://www.statistics.com/logistic.

"Logistic Regression" will cover the functional form of the logistic model and how to interpret model coefficients the concepts of "odds" and "odds ratio" are examined, as well as "risk ratio" and the difference between the two statistics. Our emphasis is on model construction, interpretation, and goodness of fit. Exercises include hands-on computer problems.

Dr. Joseph Hilbe, the instructor, the author of "Logistic Regression Models," and also "Generalized Linear Models and Extensions" and "Generalized Estimating Equations," was, until recently, the software reviews editor for "The American Statistician."  An ASA Fellow, he is currently Emeritus Professor at the University of Hawaii and Solar System Ambassador with NASA's Jet Propulsion Laboratory at California Institute of Technology.  Participants can ask questions and exchange comments directly with Dr. Hilbe via a private discussion board throughout the period.

As with all online courses at statistics.com, there are no set hours when participants must be online; course work requires about 15 hours per week.

Aim of Course:
Logistic regression is one of the most commonly-used statistical techniques. It is used with data in which there is a binary (success-failure) outcome (response) variable, or where the outcome takes the form of a binomial proportion. Like linear regression, one estimates the relationship between predictor variables and an outcome variable. In logistic regression, however, one estimates the probability that the outcome variable assumes a certain value, rather than estimating the value itself. This course will cover the functional form of the logistic model and how to interpret model coefficients. The concepts of "odds" and "odds ratio" are examined, as well as "risk ratio" and the difference between the two statistics. Our emphasis is on model construction, interpretation, and goodness of fit. Exercises include hands-on computer problems.

Who Should Take This Course:
Medical researchers, epidemiologists, forensic statisticians, environmental scientists, actuaries, data miners, industrial statisticans, sports statisticians, and fisheries, to name a few, will all find this course useful. It is an essential course for anyone who needs to model data with binary or categorical outcomes, and who need to estimate probabilities of given outcomes based on predictor variables.

Course Program:

Course outline: The course is structured as follows

 

SESSION 1: Basic Terminology and Concepts

  • Software for modeling logistic regression: Stata, R, SAS, SPSS, other
  • History of the logistic model
  • Concepts related to logistic regression
  • 2x2, 2xn models of odds and risk ratios
  • Fitting algorithms

SESSION 2: Logistic Model Construction

  • Derivation of the binary logistic model
  • Model-building strategies
  • Link tests, partial residual plots
  • Standard errors: scaling, bootstrap, jackknife, robust
  • Interpreting odds ratios as risk ratios - criteria
  • Stepwise methods, missing values, constrained coefficients, etc Construction and interpretation of interactions

 

SESSION 3: Analysis, Fit, and Interpretation of the Logistic Model

  • Goodness of fit tests
  • Information criterion tests
  • Residual analysis
  • Validation models

SESSION 4: Binomial Logistic Regression and Overdispersion
  • The meaning and types of overdispersion
  • Simulations: detecting apparent vs real overdispersion
  • Methods of handling real overdispersion

You will be able to ask questions and exchange comments with the instructors via a private discussion board throughout the course.   The courses take place online at statistics.com in a series of 4 weekly lessons and assignments, and require about 15 hours/week.  Participate at your own convenience; there are no set times when you must be online. You have the flexibility to work a bit every day, if that is your preference, or concentrate your work in just a couple of days.

For Indian participants statistics.com accepts registration for its courses at special prices in Indian Rupees through its partner, the Center for eLearning and Training (C-eLT), Pune (www.c-elt.com).

For India Registration and pricing, please visit us at www.india.statistics.com.

If you have any query please feel free to call me or write to me. 

For More details contact at
Call: 020 66009116

Websites:

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