substantial MARGIN OF ERROR miscalculation


Senior Member
English-United Sates
Salut à tous,

I've found through another thread that "margin of error" is said to be: "marge d'erreur"

However, I was wondering how one would specifically express a poorly calculated expected margin of error in reference to exit polls used after one votes for in an election.

would I use a something with a "significant departure from anticipated margin of error values?"

here are some rough attempts:

une grosse erreur de calcul sur la marge d'erreur estimée
une grosse erreur sur la marge d'erreur estimée
une grosse déviation de la prévision de marge d'erreur

merci d'avance!!
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