condition mean min max ZT0-3 449.25 449.25 449.25 ZT4-7 647.9 647.9 647.9 ZT8-11 485.70000000000005 485.70000000000005 485.70000000000005 ZT12-15 541.35 541.35 541.35 ZT16-19 457.0 457.0 457.0 ZT20-23 450.75 450.75 450.75