condition mean min max ZT0-3 408.45000000000005 408.45000000000005 408.45000000000005 ZT4-7 522.7 522.7 522.7 ZT8-11 492.65 492.65 492.65 ZT12-15 462.05 462.05 462.05 ZT16-19 494.45 494.45 494.45 ZT20-23 417.15 417.15 417.15