michal33 wrote: > Hello, > > I am new to R and have tried to search similar questions but could not find > exactly what I am looking for, but I apologize if the question was already > asked. > > I have 10 different treatments and want to know whether they affect the sex > ratios of insect emergence. After running the glms I got this table: > > Df Deviance Resid. Df Resid. Dev F Pr(>F) > NULL 133 9250.3 > sex 1 481.5 132 8768.9 7.7212 0.006314 ** > trt 9 1099.1 123 7669.7 1.9585 0.049780 * > > But now I would like to know WHICH of the treatments was significant. I > tried to use Tukey test but for some reason it does not work. > My question is: > I used the following function: >> summary(file.name, corr=F) > and got the following table: > Deviance Residuals: > Min 1Q Median 3Q Max > -14.118 -4.808 -1.466 2.033 33.882 > Coefficients: > Estimate Std. Error t value Pr(>|t|) > (Intercept) 8.696e+00 1.893e+00 4.594 1.06e-05 *** > sexm -3.791e+00 1.364e+00 -2.779 0.00631 ** > trtccc -1.050e+00 4.325e+00 -0.243 0.80859 > trtcga3 2.450e+00 4.325e+00 0.566 0.57211 > trtcga4 -2.300e+00 4.325e+00 -0.532 0.59584 > trtg 1.550e+00 2.497e+00 0.621 0.53593 > trtga4 -5.550e+00 4.325e+00 -1.283 0.20183 > trtp 5.422e+00 2.566e+00 2.113 0.03658 * > trtpg -1.850e+00 2.497e+00 -0.741 0.46019 > trtw -3.634e-17 2.497e+00 -1.46e-17 1.00000 > trtwg -3.750e+00 2.497e+00 -1.502 0.13573 > > What do the stars mean?
Well, you omitted the last lines from the output which include: Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 i.e. *** for values < 0.001; * for values in [0.01, 0.05) etc. Uwe Ligges Is it the same as Tukey test that tells me which > treatment is different from which? i.e. is trtp (with *) significantly > different to the control (which, by the way do not appear in this list and I > do not know why)? > > Thanks > Michal > > ______________________________________________ R-help@stat.math.ethz.ch 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.
