condition mean min max ZT0-3 5514.1 5514.1 5514.1 ZT4-7 8796.4 8796.4 8796.4 ZT8-11 7562.5 7562.5 7562.5 ZT12-15 4586.9 4586.9 4586.9 ZT16-19 1464.1999999999998 1464.1999999999998 1464.1999999999998 ZT20-23 1648.9 1648.9 1648.9