condition mean min max ZT0-3 27.56315 24.9829 30.1434 ZT4-7 45.4059 45.4059 45.4059 ZT8-11 49.91775 49.91775 49.91775 ZT12-15 0 0 0 ZT16-19 43.76885 43.76885 43.76885 ZT20-23 50.28615 50.28615 50.28615