condition mean min max ZT0-3 65.540055 65.540055 65.540055 ZT4-7 67.56216500000001 67.56216500000001 67.56216500000001 ZT8-11 93.7031565 93.7031565 93.7031565 ZT12-15 80.6948395 80.6948395 80.6948395 ZT16-19 129.2991095 129.2991095 129.2991095 ZT20-23 105.1409475 105.1409475 105.1409475