[R] Interpreting the Results of GLM
sazzle
sg304 at ex.ac.uk
Tue Feb 28 11:48:26 CET 2012
Hi, I'm wondering if you can help me, this is a really simple query but I
keep getting confused. I have run a GLM to see how boldness varies over
time following a particular treatment. The results are as follows...
Call: glm(formula = boldtwentyfour ~ treatment + boldcontrol)
Deviance Residuals:
Min 1Q Median 3Q Max
-1.7577 -0.5469 0.0456 0.5515 1.5327
Coefficients: Estimate Std. Error t value Pr(>|t|)
(Intercept) 0.8312 0.5444 1.527 0.1363
treatmentPBS 0.1391 0.2842 0.490 0.6277
boldcontrol 0.4899 0.2157 2.271 0.0298 *
Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
(Dispersion parameter for gaussian family taken to be 0.7131691)
Null deviance: 27.243 on 35 degrees of freedom
Residual deviance: 23.535 on 33 degrees of freedom
AIC: 94.862 Number of Fisher Scoring iterations: 2
Basically, where I am having trouble is that I have several GLMs like this
and need to display the results in a table and am required to display the
intercept, estimates, 95% confidence and the errors. I am confused as to
which values are which as for the intercept there are four different values
which all seem to relate to everything else I need to report, while
everything else would go unreported. From this table of output from R can
you help me to identify which value is which?
Thanks,
Sarah.
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