See pp. 46-47 of the SPSS Regression Models 9.0 (or 10.0) manual (or corresponding pages of earlier editions) for discussion of the three chi^2 values. The significance (which many people call the p-value) is based on a nondirectional alternative, which means that it's two-sided. It's actually one-tailed, but two-sided.

David Nichols Principal Support Statistician and Manager of Statistical Support SPSS Inc.

> -----Original Message----- > From: lee boonsiew [mailto:leebsiew@HOTMAIL.COM] > Sent: Sunday, December 12, 1999 10:15 AM > To: SPSSX-L@LISTSERV.UGA.EDU > Subject: [SPSSX-L] likelihood test > > > Dear members, > > if i have -2LL of 138.58592 without independents and -2LL of > 105.712 when > include independents. the following are my results: > > chi square df significant > model 32.874 6 .000 > block 32.874 6 .000 > step 32.874 6 .000 > > Why do i have model, block and step with same chi-square? what is the > difference among them? Do i have to check back on the chi > square table to > see whether it is significant or not? Is the model tested on > 2-tailed test > or one tail?? > > How do I present my results using the above values?? > > LEE > University MAlaysia SArawak > > ______________________________________________________ > Get Your Private, Free Email at http://www.hotmail.com >