condition mean min max ZT0-3 0.7965671117500001 0.536552176 1.0565820475 ZT4-7 2.075955379 1.9794309005000001 2.1724798575 ZT8-11 1.86236914325 1.8237089210000001 1.9010293655 ZT12-15 3.8604876832499997 3.4817423324999996 4.239233034 ZT16-19 5.44164926575 4.8748989235 6.0083996079999995 ZT20-23 9.1524484335 7.935275454999999 10.369621412