condition mean min max ZT0-3 44.42125 36.1078 50.86775 ZT4-7 50.98955 50.98955 50.98955 ZT8-11 94.9966 94.9966 94.9966 ZT12-15 122.08675 121.908 122.2655 ZT16-19 98.5946 98.5946 98.5946 ZT20-23 62.8317 62.8317 62.8317