Thank you for a great video! I have a question: why is it important to centre the variables? Also, in my case, I want to look at the interaction effect of 'Incumbency' on the 'total amount of money' a candidate receives in an election when trying to predict 'vote share (%)' (DV). However, while money is a numerical value, I have coded 'incumbency' as a binary value of either 1 (they are an incumbent) or 0 (they are a challenger, or the seat is uncontested). Can I just multiply these together as you did in the video, even though my variables are different types of data? Thank you for your help!
Thank you for a great video! I have a question: why is it important to centre the variables? Also, in my case, I want to look at the interaction effect of 'Incumbency' on the 'total amount of money' a candidate receives in an election when trying to predict 'vote share (%)' (DV). However, while money is a numerical value, I have coded 'incumbency' as a binary value of either 1 (they are an incumbent) or 0 (they are a challenger, or the seat is uncontested). Can I just multiply these together as you did in the video, even though my variables are different types of data? Thank you for your help!
Halo, I’m curious about the main effect of X no need to be consider?
Thank you!