Ensemble

A collection of models used together to create a combined result. Ensembles generally give an improved and more robust result.  Also referred to as a "committee".

Erroneous Data

A data point whose value is in error and is invalid.  This value may or may not appear to be an outlier.  Erroneous data should be excluded from any analysis unless one is analyzing causes of error.  Errors may be caused by data collection or extraction faults, such as data entry errors, network errors, invalid queries and so forth.