I don't often comment on youtube videos, but this was such a clear explanation of a process I have been trying to figure out for a while for my manuscript, so thank you very much!
I can't thank you enough. For my thesis work, I was forced to design moderator grafts in excel. However, this problem was solved when I found and watched your video. Thank you again. Yours
how can I get the gradient of the regression line? like the high, medium and low? Is the effect of high, medium and low equals to the slope of regresion line B?