condition mean min max ZT0-3 7.646685 7.5027550000000005 7.790615 ZT4-7 4.5430150000000005 4.5430150000000005 4.5430150000000005 ZT8-11 3.530625 3.530625 3.530625 ZT12-15 0 0 0 ZT16-19 4.936299999999999 4.936299999999999 4.936299999999999 ZT20-23 5.81598 5.81598 5.81598