condition mean min max ZT0-3 567.0 567.0 567.0 ZT4-7 357.9 357.9 357.9 ZT8-11 379.9 379.9 379.9 ZT12-15 486.1 486.1 486.1 ZT16-19 578.6500000000001 578.6500000000001 578.6500000000001 ZT20-23 518.3 518.3 518.3