I have a standardized beta from a regression, which is equivalent to a correlation. I also have it’s standard error (SE). I want to plot the R2 (explained variance) with an error bar, and to get the R2, I simply square the standardized beta. For the error bar, I want to use the SE for the R2, how do I transform the SE of the standardized beta so I can use it for the R2? Do I also simply square the SE, or is it more complicated than that?