Sample Variance DISASTER

#1
:confused: I'm at my wits end i, for some reason, cannot at all get this formula in my text to work...PLEASE anyone who can help i need to understand this :shakehead
thanks a ton!!
Amy

Formula
 
#2
Well, this formula is somewhat misleading, and possibly incorrect. It appears that the "n" in the numerator is not squared . . . and it should be. Take a look at this formula, I think it is better.




~Matt