condition mean min max ZT0-3 36.1867 36.1867 36.1867 ZT4-7 40.5811 40.5811 40.5811 ZT8-11 36.2988 36.2988 36.2988 ZT12-15 47.18165 47.18165 47.18165 ZT16-19 69.63425000000001 69.63425000000001 69.63425000000001 ZT20-23 58.518 58.518 58.518