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It is, literally, a summary of data by using five numbers:
Minimum, 1st percentile, Median, 3rd percentile, and Maximum.
Box Plot
A box plot is drawn using these five numbers:
Outliers in Box Plot
In a box plot, outliers are defined as value < Q1 – 1.5 * IQR or value > Q3 + 1.5 * IQR
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