condition mean min max ZT0-3 336.014523 336.014523 336.014523 ZT4-7 797.172743 797.172743 797.172743 ZT8-11 1485.9428085 1485.9428085 1485.9428085 ZT12-15 1126.150306 1126.150306 1126.150306 ZT16-19 1546.207529 1546.207529 1546.207529 ZT20-23 749.229704 749.229704 749.229704