Are we supposed to know the formulas for Mean difference which have the same variance and the one which doesnt
I doubt it. Anyway, both those formulas are bogus in some sense so it’s hard to believe that CFAI would penalize you for using one bogus formula instead of a different bogus formula.
Is JoeyDVivre’s answer still applicable ? Just wanted to confirm as this is a very old post. Thanks.
Nobody questions JDV’s answers.
Full disclosure: I know JDV only by his reputation; he’d left the forum before I joined.
Nevertheless . . . .