search for: rsancova

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2012 Dec 03
0
Nested ANCOVA question
...do I test to see if there is a tank effect at this point,? I'm not sure which Mean Sq value to test over the residuals, or if I should wait to do that until the next test? This next part removes the interaction term to just test the treatment effect while removing the effect of length. right? RSancova<-aov(area~length+treatment+Error(tank/treatment),data=fishdata) summary(RSancova) #Error: tank # Df Sum Sq Mean Sq #length 1 753.6 753.6 # #Error: tank:treatment # Df Sum Sq Mean Sq #length 1 4633 4633 # #Error: Within # Df Sum Sq Mean Sq F value Pr(>F) #l...