condition mean min max ZT0-3 12.441882499999998 10.325614999999999 14.55815 ZT4-7 5.73198 5.73198 5.73198 ZT8-11 3.58949 3.58949 3.58949 ZT12-15 0 0 0 ZT16-19 9.335705 9.335705 9.335705 ZT20-23 10.101635 10.101635 10.101635