Stephen Lau asks: > > I used the function 'glm' to perform logistic regression, and > then use 'summary' to display the fitting result. There are 'z > value' and 'Pr(>|z|)'
The z value is the Wald statistic for testing the hypothesis that the corresponding parameter (regression coefficient) is zero. Under the null hypothesis it has an approximately N(0,1) distribution. P(>|z|) is the tail area in a 2-tail test, i.e. the test within a 2-sided outer hypothesis. > > Do they simpily represent the result of 'z test' ? Yes, in the sense above. > as I perform the 'z test' for a particular variable following the > definition, it yields a different result. Have you found your mistake yet? ___ Bill Venables CSIRO Laboratories PO Box 120, Cleveland, 4163 AUSTRALIA Office Phone (email preferred): +61 7 3826 7251 Fax (if absolutely necessary): +61 7 3826 7304 Mobile: +61 4 8819 4402 Home Phone: +61 7 3286 7700 mailto:[EMAIL PROTECTED] http://www.cmis.csiro.au/bill.venables/ ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
