condition mean min max ZT0-3 0.23018741850000002 0.197599215 0.26277562200000004 ZT4-7 0.35660367375 0.289027602 0.42417974550000004 ZT8-11 6.8735130065000005 1.5607305710000001 12.186295442 ZT12-15 18.290700075 17.891190415 18.690209735 ZT16-19 10.161132842250002 8.840272642 11.481993042500001 ZT20-23 6.332840928 6.1756042845 6.4900775715000005