condition mean min max ZT0-3 1470.3 1470.3 1470.3 ZT4-7 1339.7 1339.7 1339.7 ZT8-11 1226.4499999999998 1226.4499999999998 1226.4499999999998 ZT12-15 1059.0 1059.0 1059.0 ZT16-19 683.0 683.0 683.0 ZT20-23 894.95 894.95 894.95