condition mean min max ZT0-3 173.337902 173.337902 173.337902 ZT4-7 118.112499 118.112499 118.112499 ZT8-11 104.1236895 104.1236895 104.1236895 ZT12-15 122.804652 122.804652 122.804652 ZT16-19 129.6151735 129.6151735 129.6151735 ZT20-23 137.67690449999998 137.67690449999998 137.67690449999998