QUALITY_ZMAX

Python object: phenotypic.schema._quality_zmax.QUALITY_ZMAX

Measurement info for the replicate-agreement modified Z-score QC check.

Documents the per-check extra columns behind the modified Z-score (ZMax) agreement check, which scales each member’s deviation from the group median by the MAD to spot the colony that disagrees most with its replicates or detection runs. A large modified Z-score often marks contamination, edge artifacts, or segmentation errors rather than real biology, so these columns drive curation decisions downstream of the QC pipeline.

Category: QC_ZMax

Column label	Description	Type
QC_ZMax_Median	Group median of the measurement.	Quality
QC_ZMax_MAD	Median absolute deviation used to scale the modified Z-score.	Quality
QC_ZMax_NumMembers	Members contributing to the statistic.	Quality