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Are Outliers Adequate Normality?

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Are Outliers Adequate Normality?
According to Hair et al. (2006), outliers represent an observation(s) that deviate markedly from other observations due to high or low scores.
• Researchers demonstrated that outliers can violate the normality and can lead to type I and II error (see Kline 2005).
• As a rule of thumb, outliers exist when the cases have standard score greater than ±3.29 (Tabachnick & Fidell
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