condition mean min max ZT0-3 1171.9581666666666 897.7950000000001 1310.5245 ZT4-7 1637.6799999999998 1637.6799999999998 1637.6799999999998 ZT8-11 5971.030000000001 5971.030000000001 5971.030000000001 ZT12-15 5898.049999999999 4585.98 7210.12 ZT16-19 2545.435 2545.435 2545.435 ZT20-23 1721.415 1721.415 1721.415