condition mean min max ZT0-3 79.252508 79.252508 79.252508 ZT4-7 77.16523600000001 77.16523600000001 77.16523600000001 ZT8-11 92.7600175 92.7600175 92.7600175 ZT12-15 102.401581 102.401581 102.401581 ZT16-19 188.62753450000002 188.62753450000002 188.62753450000002 ZT20-23 148.936971 148.936971 148.936971