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Outliers

Definition: an outlier is a value in a data set that differs from the other set values. An outlier is usually more than 1.5 times the interquartile range values beyond the quartiles. An observation is an outlier if it falls more then 1.5(IQR) above the upper quartile or more than 1.5(IQR) below the lower quartile. Example: For a data set , the first quartile is 70 and the median is 55

 

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