condition mean min max ZT0-3 78.860418 78.860418 78.860418 ZT4-7 79.88302949999999 79.88302949999999 79.88302949999999 ZT8-11 81.05249699999999 81.05249699999999 81.05249699999999 ZT12-15 111.1132825 111.1132825 111.1132825 ZT16-19 94.5737345 94.5737345 94.5737345 ZT20-23 100.4965885 100.4965885 100.4965885