condition mean min max ZT0-3 9.007641981999999 8.831987105 9.183296859 ZT4-7 33.20505079025 20.8565838855 45.553517695 ZT8-11 18.8396815895 7.459256894 30.220106285 ZT12-15 0.53930837975 0.07090357250000001 1.007713187 ZT16-19 0.1897409665 0.09562379100000001 0.283858142 ZT20-23 0.22844942775 0.215259961 0.24163889449999998