Ononot — In a scatter plot, a data point is identified as an 'outlier

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Data Visualizationmedium

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In a scatter plot, a data point is identified as an 'outlier' if it lies beyond $3$ standard deviations from the regression line. If the residuals $e_i$ have a standard deviation $s_e = 5$ , what is the threshold residual value for a point to be considered an outlier?