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seen Sep 6 at 8:50

Jun
18
comment “Fully correlated” definition
I think there is an misunderstanding here. X and Y that Michael mentioned is the variables inside a r.v, and X that "did" mentioned is the r.v itself. Anyway, Michael has done a great yet simple explanation and I will accept his answer. Thank everyone for help me
Jun
15
comment “Fully correlated” definition
I think he meant correlation coefficient