condition mean min max ZT0-3 207.95 207.95 207.95 ZT4-7 335.3 335.3 335.3 ZT8-11 436.0 436.0 436.0 ZT12-15 463.70000000000005 463.70000000000005 463.70000000000005 ZT16-19 298.2 298.2 298.2 ZT20-23 224.35 224.35 224.35