condition mean min max ZT0-3 0.56900925 0.39538850000000003 0.74263 ZT4-7 1.151465 1.151465 1.151465 ZT8-11 1.1484955 1.1484955 1.1484955 ZT12-15 0 0 0 ZT16-19 1.778865 1.778865 1.778865 ZT20-23 2.14419 2.14419 2.14419