IN THIS PART . . .

Understand correlation, which is the strength and

direction of the relationship between two variables,

and regression, which is a set of techniques for

describing the relationship between two variables.

Get a handle on straight-line regression, which is the

simplest kind of regression.

Do multiple regression analysis, which is regression

when there’s more than one predictor variable.

Find out about other useful kinds of regression you

encounter in biological research, such as Poisson

regression and nonlinear regression.