condition mean min max ZT0-3 26.05825 26.05825 26.05825 ZT4-7 24.9085 24.9085 24.9085 ZT8-11 18.75195 18.75195 18.75195 ZT12-15 16.819 16.819 16.819 ZT16-19 23.43755 23.43755 23.43755 ZT20-23 22.66125 22.66125 22.66125