condition mean min max ZT0-3 8.530457499999999 7.401435 9.659479999999999 ZT4-7 4.444535 4.444535 4.444535 ZT8-11 2.161525 2.161525 2.161525 ZT12-15 0 0 0 ZT16-19 4.762404999999999 4.762404999999999 4.762404999999999 ZT20-23 3.02552 3.02552 3.02552