condition mean min max ZT0-3 25.6681922625 23.156967594999998 28.17941693 ZT4-7 25.6438821475 24.50425203 26.783512265 ZT8-11 25.8837417725 25.358005155 26.409478389999997 ZT12-15 21.799144405 19.89580636 23.702482449999998 ZT16-19 21.19392476 20.240287215 22.147562305 ZT20-23 23.4997874325 23.32289767 23.676677195