QUALITY_MAD
===========

Python object: ``phenotypic.schema._quality_mad.QUALITY_MAD``

Measurement info for the replicate-agreement MAD QC check.

Documents the per-check extra columns produced by the median absolute
deviation (MAD) agreement check, which gauges how tightly biological
replicates or detection runs agree on a colony phenotype. The MAD is a
robust spread estimate that resists single contaminated or mis-segmented
colonies, so these columns help flag groups whose disagreement signals
imaging artifacts rather than real biology.

.. list-table:: Category: **QC_MAD**
   :header-rows: 1

   * - Column label
     - Description
   * - ``QC_MAD_Median``
     - Group median of the measurement.
   * - ``QC_MAD_MAD``
     - Median absolute deviation (raw, before normalization).
   * - ``QC_MAD_NumMembers``
     - Members contributing to the statistic.