condition mean min max ZT0-3 206.4185 145.10500000000002 238.6415 ZT4-7 159.48149999999998 159.48149999999998 159.48149999999998 ZT8-11 178.44150000000002 178.44150000000002 178.44150000000002 ZT12-15 244.572 215.4855 273.6585 ZT16-19 315.505 315.505 315.505 ZT20-23 324.756 324.756 324.756