Hi Tom,
In an OLS regression, the residuals from both regressions (varA ~ varB
and varB ~ varA) are different but their distributions are (more or
less) symmetric. So, because the residuals are independent (ie, their
covariance is null), the residual standard error will be the same (or
very
Hi All,
I am running a pgls regression analysis in the caper package in R. My dataset
has a continuous response variable and five explanatory variables (three
continuous, two discrete and with multiple categories). Each datapoint in the
response variables corresponds to a single species of
I think the issue is largely one of conceptualizing the problem.
People often view body size as an independent variable when analyzing brain
size, but obviously this is a serious oversimplificaiton -- usually done for
statistical convenience -- that does not reflect the biology (yes, I have also
