Below are three formulae. XXX XXX X) Formula 1 N 1 Formula 2 XXX _ XX}, _ 17) N 1 X X Y 17 Formula 3 XX X ) (N 1)(5Dx)(SDy) In the space below: (1) Identify the statistic in each formula (3 points) (2) Define each statistic (3 points) (3) Reference what's going on in the formula (i.e., given the definition of what the statistic measures, explain how that definition is evident in the form