condition mean min max ZT0-3 48.9266 47.742000000000004 50.1112 ZT4-7 59.644149999999996 59.644149999999996 59.644149999999996 ZT8-11 58.76545 58.76545 58.76545 ZT12-15 0 0 0 ZT16-19 77.13665 77.13665 77.13665 ZT20-23 58.77845 58.77845 58.77845