condition mean min max ZT0-3 102.80548333333334 92.01645 113.0385 ZT4-7 61.561499999999995 61.561499999999995 61.561499999999995 ZT8-11 41.477599999999995 41.477599999999995 41.477599999999995 ZT12-15 85.72205 81.91895 89.52515 ZT16-19 80.47215 80.47215 80.47215 ZT20-23 89.85565 89.85565 89.85565