condition mean min max ZT0-3 1259.3 1259.3 1259.3 ZT4-7 1440.5 1440.5 1440.5 ZT8-11 1414.05 1414.05 1414.05 ZT12-15 1482.3 1482.3 1482.3 ZT16-19 1380.1999999999998 1380.1999999999998 1380.1999999999998 ZT20-23 1376.4499999999998 1376.4499999999998 1376.4499999999998