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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 '05
 Nezami
 Normal Distribution, central tendency Median, graphs Percentile rank, normal curve Zscore, stable measure, Descriptive Statistics Mode

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