Outlier Calculator (IQR Method)
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An outlier is a data point that lies far from other observations. The IQR method defines outliers as values below Q1 − 1.5×IQR or above Q3 + 1.5×IQR (mild outliers) or ±3×IQR (extreme outliers). The z-score method flags values more than 2–3 standard deviations from the mean.
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