Both of you are wrong! I assume that what you mean to say is the Normal curve not "the bell curve". It is EXTREMELY useful just so many people don't understand and misuse it. Like "the relationship...is .8 of a standard deviation" makes absolutely NO sense. Perhaps you meant a .8 correlation? Perhaps you'd like to join my students in stats class so you can sound smarter too.
I sincerely hope you're not teaching kids statistics.
Welcome to FR!