condition mean min max ZT0-3 469.31316666666663 368.154 586.2719999999999 ZT4-7 441.24 441.24 441.24 ZT8-11 390.97249999999997 390.97249999999997 390.97249999999997 ZT12-15 564.94775 511.9525 617.943 ZT16-19 612.133 612.133 612.133 ZT20-23 601.441 601.441 601.441