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Find the variance of the observations 2, 4, 4, 4, 5, 5, 7, 9 (population variance).
A2
B5
C4
D3.5
Answer & Solution
Correct answer: C. 4
Mean is 5; squared deviations are 9,1,1,1,0,0,4,16 which total 32, and 32/8 = 4.
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