condition mean min max ZT0-3 4.98126215175 4.5672236315 5.395300672 ZT4-7 2.064720005 2.039727958 2.089712052 ZT8-11 2.021442096 1.7059107815 2.3369734104999997 ZT12-15 4.08821314375 2.6936687900000003 5.482757497500001 ZT16-19 2.9216739082500003 2.692572601 3.1507752155000004 ZT20-23 5.7857881935 4.9153197735 6.6562566135