For the data x1 = -1, x2 = -3, x3 = -2, x4 = 1, x5 = 0, find ∑ (xi2).
ANSWER :
∑ X^2
= (-1)^2 + (-3)^2 + (-2)^2 + 1^2 + 0^2
= 1 + 9 + 4 + 1 + 0
= 15 (ANSWER)
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