the median level of appraisal is the median appraisal
ratio of a reasonable and representative sample of properties in an
appraisal district. An appraisal ratio is the ratio of a property's
appraised value as determined by the appraisal office or appraisal
review board, as applicable, to:
(1) the appraised value of the property according to
law if the property qualifies for appraisal for tax purposes
according to a standard other than market value; or
(2) the market value of the property if Subdivision
(1) of this subsection does not apply.
(c) The median appraisal ratio for a sample of properties
is, in a numerically ordered list of the appraisal ratios for the
properties:
(1) if the sample contains an odd number of
properties, the appraisal ratio above and below which there is an
equal number of appraisal ratios in the list; or
(2) if the sample contains an even number of
properties, the average of the two consecutive appraisal ratios
above and below which there is an equal number of appraisal ratios