condition mean min max ZT0-3 0.14754494449999997 0.0 0.29508988899999994 ZT4-7 2.004358569 1.5276075804999998 2.4811095575 ZT8-11 1.96142204725 1.9375990355 1.985245059 ZT12-15 1.8141053545 1.7042591885 1.9239515205000002 ZT16-19 2.53555209775 1.8387270215 3.2323771740000002 ZT20-23 8.2561143605 5.9351392265000005 10.577089494500001