Question: Using the data from Exercise 2.15, (a) Calculate (X)2 and X2. (b) Calculate X/N, where N 5 the number of scores. (c) What do you

Using the data from Exercise 2.15,
(a) Calculate (ΣX)2 and ΣX2.
(b) Calculate ΣX/N, where N 5 the number of scores.
(c) What do you call what you just calculated?

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