POWER USER PRO TIP

Outlier Detection

Statistically speaking, outliers are defined as “data points which fall more than 1.5 times the interquartile range above the 3rd quartile or below the 1st quartile”. In plain English, we’re talking about abnormally small or large values in a data set.

For this tip, we’ll use some basic Excel stats functions (like MEDIAN and QUARTILE) to define and conditionally format outliers in our sample of Major League Baseball pitchers.

COMMON USE CASES:

  • Identifying statistical anomalies in a dataset, based on custom criteria
  • Finding and removing values that may have been incorrectly entered

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