condition mean min max ZT0-3 14.403140000000002 1.9813649999999998 38.106750000000005 ZT4-7 8.284565 8.284565 8.284565 ZT8-11 27.65135 27.65135 27.65135 ZT12-15 134.93669999999997 65.9109 203.96249999999998 ZT16-19 58.646950000000004 58.646950000000004 58.646950000000004 ZT20-23 10.590115 10.590115 10.590115