Tukey’s Fences

Tukey’s Fences is an outlier detection method based on the Interquartile Range (IQR), which is the range between the 25th percentile (Q1) and the 75th percentile (Q3). Tukey’s fences define boundaries outside which data points are considered outliers.

Tukey's Fences Parameters

Param Name	Description	Default Values	Possible Values
Q1	First quartile (25th percentile) of the dataset	Computed from data	-
Q3	Third quartile (75th percentile) of the dataset	Computed from data	-
IQR	Interquartile Range = Q3 - Q1	Computed from Q1/Q3	-
k	Multiplier for IQR to define fences	1.5	1.0 (mild), 1.5 (standard), 2.0, 3.0
Lower Fence	Q1 - k × IQR	Depends on k	-
Upper Fence	Q3 + k × IQR	Depends on k	-