condition mean min max ZT0-3 0.37764820875 0.0 0.7552964175 ZT4-7 9.7042124835 4.9382086665 14.470216300499999 ZT8-11 35.8770334675 28.915782290000003 42.838284645 ZT12-15 37.164359405 33.4867516 40.84196721 ZT16-19 20.1753485475 16.14284014 24.207856955000004 ZT20-23 9.1620404215 6.948711488000001 11.375369355