condition mean min max ZT0-3 47.2587253975 26.52952426 67.987926535 ZT4-7 199.86048125000002 175.20292410000002 224.51803840000002 ZT8-11 267.925495075 262.5448397 273.30615045 ZT12-15 309.812333675 281.72520695 337.89946039999995 ZT16-19 163.186785175 122.7212443 203.65232605 ZT20-23 68.24890287 52.22500516 84.27280058