condition mean min max ZT0-3 963.7 963.7 963.7 ZT4-7 838.5 838.5 838.5 ZT8-11 1107.8 1107.8 1107.8 ZT12-15 1226.85 1226.85 1226.85 ZT16-19 1154.4 1154.4 1154.4 ZT20-23 1129.4499999999998 1129.4499999999998 1129.4499999999998