condition mean min max ZT0-3 342.5 342.5 342.5 ZT4-7 260.7 260.7 260.7 ZT8-11 280.70000000000005 280.70000000000005 280.70000000000005 ZT12-15 354.9 354.9 354.9 ZT16-19 331.6 331.6 331.6 ZT20-23 293.0 293.0 293.0