Biostatistics For Dummies

Part IV

Looking for Relationships with Correlation and Regression

Illustration by Wiley, Composition Services Graphics

Get the scoop on model building with stepwise regression in a free article at www.dummies.com/extras/biostatistics.

In this part . . .

  Understand what correlation and regression are. (Simply stated: Correlation refers to the strength of the relationship between two variables, and regression refers to a set of techniques for describing the relationship between two variables.)

  Get a handle on the simplest kind of regression — fitting a straight line to your data.

  Do regression analysis when there’s more than one predictor variable. (As you may guess, this type of regression is called multiple regression.)

  Predict a yes-or-no outcome with logistic regression, and assess sensitivity and specificity with ROC curves.

  Find out about other useful kinds of regression ...