condition mean min max ZT0-3 36.095 36.095 36.095 ZT4-7 29.719949999999997 29.719949999999997 29.719949999999997 ZT8-11 26.280450000000002 26.280450000000002 26.280450000000002 ZT12-15 27.2502 27.2502 27.2502 ZT16-19 34.32215 34.32215 34.32215 ZT20-23 36.59385 36.59385 36.59385