If you want to know how to calculate the CI, you can study the code of this function. You can access the code by nlme:::intervals.lme.
Best 2009/3/17 WONG, Ka Yau <ka...@ied.edu.hk>: > No standard deviation of variable in the random effect is > provided. How to construct CI? > > Best Regards, > Tommy > Research Assistant of HKIEd > ________________________________ > From: ronggui [mailto:ronggui.hu...@gmail.com] > Sent: 17/3/2009 [Tue] 14:10 > To: WONG, Ka Yau > Cc: r-help@r-project.org > Subject: Re: [R] Multilevel modeling using R > > You can use intervals to get the Confidence intervals of fixed and > random effects. > > Best > > 2009/3/17 WONG, Ka Yau <ka...@ied.edu.hk>: >> Dear All, >> >> I use R to conduct multilevel modeling. However, I have a problem >> about the interpretation of random effect. Unlike the variables in fixed >> effects, the variables in random effects have not shown the p-value, so I >> don't know whether they are significant or not? I want to obtain this figure >> to make the decision. Thanks a lot! >> >> Below is the syntax and output of my program: >> >> library(nlme) >> dataset <- read.csv("d:/dataset.csv") >> lme11 <- lme(Overall~1, random=~1|School, method="ML", data=dataset) >> summary(lme11) >> >> Linear mixed-effects model fit by maximum likelihood >> Data: dataset >> AIC BIC logLik >> 12637.06 12656.27 -6315.53 >> >> Random effects: >> Formula: ~1 | School >> (Intercept) Residual >> StdDev: 0.2912031 0.9894488 (<-- No p-value) >> >> Fixed effects: Overall ~ 1 >> Value Std.Error DF t-value p-value >> (Intercept) 0.7755495 0.06758038 4444 11.47596 0 (<-- >> Have p-value) >> >> Standardized Within-Group Residuals: >> Min Q1 Med Q3 >> Max >> -3.797466473 -0.661750231 -0.007874993 0.652625939 3.549169733 >> >> Number of Observations: 4464 >> Number of Groups: 20 >> >> >> Best Regards, >> Tommy >> Research Assistant of HKIEd >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> 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. >> > > > > -- > HUANG Ronggui, Wincent > Tel: (00852) 3442 3832 > PhD Candidate > Dept of Public and Social Administration > City University of Hong Kong > Home page: http://asrr.r-forge.r-project.org/rghuang.html > > A sociologist is someone who, when a beautiful women enters the room > and everybody look at her, looks at everybody. > > -- HUANG Ronggui, Wincent Tel: (00852) 3442 3832 PhD Candidate Dept of Public and Social Administration City University of Hong Kong Home page: http://asrr.r-forge.r-project.org/rghuang.html A sociologist is someone who, when a beautiful women enters the room and everybody look at her, looks at everybody. ______________________________________________ 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.
