condition mean min max ZT0-3 140.385903 140.385903 140.385903 ZT4-7 100.07709449999999 100.07709449999999 100.07709449999999 ZT8-11 79.78617399999999 79.78617399999999 79.78617399999999 ZT12-15 100.20069050000001 100.20069050000001 100.20069050000001 ZT16-19 139.12759 139.12759 139.12759 ZT20-23 137.21986049999998 137.21986049999998 137.21986049999998