condition mean min max ZT0-3 27.980467 27.980467 27.980467 ZT4-7 139.6923875 139.6923875 139.6923875 ZT8-11 228.4384675 228.4384675 228.4384675 ZT12-15 144.3152185 144.3152185 144.3152185 ZT16-19 71.11705549999999 71.11705549999999 71.11705549999999 ZT20-23 43.6818465 43.6818465 43.6818465