condition mean min max ZT0-3 29.6498 26.710350000000002 32.58925 ZT4-7 25.31798 25.31798 25.31798 ZT8-11 36.7459 36.7459 36.7459 ZT12-15 0 0 0 ZT16-19 49.305400000000006 49.305400000000006 49.305400000000006 ZT20-23 50.518950000000004 50.518950000000004 50.518950000000004