condition mean min max ZT0-3 549.85 549.85 549.85 ZT4-7 560.9 560.9 560.9 ZT8-11 617.95 617.95 617.95 ZT12-15 790.0999999999999 790.0999999999999 790.0999999999999 ZT16-19 579.6 579.6 579.6 ZT20-23 602.1500000000001 602.1500000000001 602.1500000000001