condition mean min max ZT0-3 32.2 32.2 32.2 ZT4-7 18.3 18.3 18.3 ZT8-11 76.65 76.65 76.65 ZT12-15 52.15 52.15 52.15 ZT16-19 57.95 57.95 57.95 ZT20-23 51.8 51.8 51.8