condition mean min max ZT0-3 0.45186 0.45186 0.45186 ZT4-7 0.669855 0.669855 0.669855 ZT8-11 0.435403 0.435403 0.435403 ZT12-15 0.1513941 0.1513941 0.1513941 ZT16-19 0.3546045 0.3546045 0.3546045 ZT20-23 0.3882775 0.3882775 0.3882775