condition mean min max ZT0-3 22.7399 22.7399 22.7399 ZT4-7 11.708300000000001 11.708300000000001 11.708300000000001 ZT8-11 15.274750000000001 15.274750000000001 15.274750000000001 ZT12-15 16.00175 16.00175 16.00175 ZT16-19 35.5146 35.5146 35.5146 ZT20-23 20.304650000000002 20.304650000000002 20.304650000000002