14.03.2014 Views

Modeling and Multivariate Methods - SAS

Modeling and Multivariate Methods - SAS

Modeling and Multivariate Methods - SAS

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Chapter 6 Fitting Generalized Linear Models 189<br />

Examples<br />

Normal Regression, Log Link<br />

Consider the following data set, where x is an explanatory variable <strong>and</strong> y is the response variable.<br />

Figure 6.6 Nor.jmp data set<br />

Using Fit Y By X, you can easily see that y varies nonlinearly with x <strong>and</strong> that the variance is approximately<br />

constant (see Figure 6.7). A normal distribution with a log link function is chosen to model these data; that<br />

is, log(μ i ) = x i 'β so that μ i = exp(x i 'β). The completed Fit Model dialog is shown in Figure 6.8.<br />

Figure 6.7 Y by X Results for Nor.jmp

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!