condition mean min max ZT0-3 2.42785 2.252045 2.603655 ZT4-7 12.3402 12.3402 12.3402 ZT8-11 26.10535 26.10535 26.10535 ZT12-15 0 0 0 ZT16-19 11.9239 11.9239 11.9239 ZT20-23 7.82729 7.82729 7.82729