On 2011 Lún 18, at 16:37, Cristian Baicus wrote:
> I am asking for help from this group in a statistical problem.
>
> I know that when one performs a multivariable analysis, he must be sure that there is no correlation between the independent variables (and this can be verified by plotting the multicollinearity matrix).
This is not true, and in most instances there will be a correlation of some sort between the independent variables. The real problem is dealing with it, because correlated independent variables mean that the estimated standard errors increase and study power decreases.
Ronán Conroy
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Associate Professor
Division of Population Health Sciences
Royal College of Surgeons in Ireland
Beaux Lane House
Dublin 2
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