Question: Positioning of the Number

F.A.Q. #1

I understand how to write the footnote page but, in my paper, where do I write the number?  For example:

"Predictions about which students will do better academically or socially in which setting are highly fallible (6)".

Does the (6) go after the period or before?

Thank you for your help.

Sincerely,
Stacy

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