what-is-x1-x2-x3

what is x1 x2 x3 on a transformer what is x1 x2 x3 x4 in transformer what is x1 x2 x3 in statistics what is x1 x2 x3 difference between x1 x2 and x3 what does x1 x2 x3 mean in statistics which one is x1 and x2 is x3 better than x1