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Unformatted text preview: Median not stable measure of central tendency, not affected by extreme scores 9/14/09 Gaussian Curve normal curve Zscore = (Score average)/sd Avg=112.4 Sd=13.7 N=250 95 CI 1.96 (85.548 139.252) 99 CI  2.58 (77.054 147.746)...
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 Nezami

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