Interesting. Now the fifth homework question you have posted here. As was stated before (by several members) this is not a homework forum.
Patrick -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of mathallan Sent: Friday, May 08, 2009 5:50 AM To: r-help@r-project.org Subject: [R] glm fit Hi, I try to ask here, because I hope someone will help me understand this problem- I have fittet a glm in R with the results > glm1 <- > glm(log(claims)~log(sum)*as.factor(grp),family=gaussian(link="identity")) > summary(glm1) Call: glm(formula = log(claims) ~ log(sum) * as.factor(grp), family = gaussian(link = "identity")) Deviance Residuals: Min 1Q Median 3Q Max -6.6836 -1.3626 -0.2576 1.2038 8.2480 Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 3.525657 0.436102 8.084 8.18e-16 *** log(sum) 0.334288 0.025668 13.024 < 2e-16 *** as.factor(grp)2 0.434262 0.976240 0.445 0.6565 as.factor(grp)3 3.666490 1.436471 2.552 0.0107 * as.factor(grp)4 0.040782 1.024730 0.040 0.9683 log(sum):as.factor(grp)2 0.007719 0.061914 0.125 0.9008 log(sum):as.factor(grp)3 -0.209986 0.091578 -2.293 0.0219 * log(sum):as.factor(grp)4 0.059342 0.067320 0.881 0.3781 --- Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 (Dispersion parameter for gaussian family taken to be 3.693731) Null deviance: 15839 on 4035 degrees of freedom Residual deviance: 14878 on 4028 degrees of freedom AIC: 16737 Number of Fisher Scoring iterations: 2 But i'm not sure what I get out of the summary. What does it tell me? How should the formula for Y look like, out from the summary? Is it something like Y=0.334288*X_sum+0.434262*X_2+ ?? And when I get a expression for Y, what does it tell me? Is it an expected expression? Can anyone help me please? -- View this message in context: http://www.nabble.com/glm-fit-tp23443121p23443121.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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. This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient(s) please contact the sender by reply email and destroy all copies of the original message. Thank you. ______________________________________________ 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.
