# Question: Using the data from Exercise 2 15 a Calculate X 2 and X2 b

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?

(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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