condition mean min max ZT0-3 0.60070825 0.5552405 0.646176 ZT4-7 1.1322999999999999 1.1322999999999999 1.1322999999999999 ZT8-11 0.4128855 0.4128855 0.4128855 ZT12-15 0 0 0 ZT16-19 0.6351725 0.6351725 0.6351725 ZT20-23 0.7986355 0.7986355 0.7986355