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Mathematics 9 Online
OpenStudy (anonymous):

The scores on the Wechsler Adult Intelligence Scale are approximately Normal with μ = 100 and σ = 15. Reference: Ref 3-4 The proportion of adults with scores between 90 and 110 is closest to A. 0.250. B. 0.432. C. 0.500. D. 0.667.

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