condition mean min max ZT0-3 356.078211 356.078211 356.078211 ZT4-7 512.3961415 512.3961415 512.3961415 ZT8-11 517.215851 517.215851 517.215851 ZT12-15 448.65129 448.65129 448.65129 ZT16-19 364.699423 364.699423 364.699423 ZT20-23 337.3860555 337.3860555 337.3860555