condition mean min max ZT0-3 25.0284 25.0284 25.0284 ZT4-7 21.35785 21.35785 21.35785 ZT8-11 40.05485 40.05485 40.05485 ZT12-15 40.07355 40.07355 40.07355 ZT16-19 38.36285 38.36285 38.36285 ZT20-23 24.42775 24.42775 24.42775