condition mean min max ZT0-3 74.94999999999999 74.94999999999999 74.94999999999999 ZT4-7 114.0 114.0 114.0 ZT8-11 142.3 142.3 142.3 ZT12-15 77.5 77.5 77.5 ZT16-19 73.65 73.65 73.65 ZT20-23 120.3 120.3 120.3