This pattern does not adhere to the common statistical definition of an outlier as a rare object , and many outlier detection methods ( in particular unsupervised methods ) will fail on such data , .
Pattern has been aggregated appropriately .
This pattern does not adhere to the common statistical definition of an outlier as a rare object , and many outlier detection methods ( in particular unsupervised methods ) will fail on such data , unless it has been aggregated appropriately .