How Can i use Arcpy to Calculate the Deviation of a pair of Coordinates

I have 4 pairs of Coordinates, all forming the corners of a parcel, have can I use Arcpy to automatically detect the outlier amongst the coordinate pairs. I'm thinking "arcpy.ClustersOutliers_stats" or "Multi-Distance Spatial Cluster Analysis" would work, but I discovered that I need Input_Field (Field):The numeric field to be evaluated for "arcpy.ClustersOutliers_stats" analysis.

Please do you have any suggestions or a better option. Thanks