1 for each of the sets of scores given in problems 5b and, Ask an Expert

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1. For each of the sets of scores given in Problems 5b and 5c, show that ΣX² ≠ (ΣX)²

2. Given the scores X₁ = 3, X₂ = 4, X₃ = 7 and X₄ = 12. find the values of the following expressions. (This question pertains to Note 2.1.)

a. Σ^N_i=1 (X_i+ 2)

b. Σ^N_i=1 (X_i - 3)

c. Σ^N_i=1 (2X_i)

d. Σ^N_i=1 (X_i / 4)

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