Free practice · boolean · hard
Practice
Reject silent outlier deletion
An analyst may remove any unusually large value without documenting it because outliers are always errors.
Response-time distribution
Most tickets cluster below seven hours, with one long delay
Ordered response hours
Ticket 12 h
Ticket 23 h
Ticket 34 h
Ticket 44 h
Ticket 55 h
Ticket 65 h
Ticket 76 h
Ticket 830 h
The 30-hour observation creates a long right tail. Investigate it before deciding whether it is an error, exception, or valid rare case.