condition mean min max ZT0-3 26.105200000000004 22.762700000000002 29.4477 ZT4-7 33.4079 33.4079 33.4079 ZT8-11 35.6369 35.6369 35.6369 ZT12-15 0 0 0 ZT16-19 35.09885 35.09885 35.09885 ZT20-23 35.4992 35.4992 35.4992