condition mean min max ZT0-3 82.7807 82.7807 82.7807 ZT4-7 87.58045 87.58045 87.58045 ZT8-11 102.33775 102.33775 102.33775 ZT12-15 80.27185 80.27185 80.27185 ZT16-19 71.0994 71.0994 71.0994 ZT20-23 63.7791 63.7791 63.7791