condition mean min max ZT0-3 507.95 507.95 507.95 ZT4-7 307.8 307.8 307.8 ZT8-11 297.55 297.55 297.55 ZT12-15 362.45000000000005 362.45000000000005 362.45000000000005 ZT16-19 401.35 401.35 401.35 ZT20-23 439.7 439.7 439.7