condition mean min max ZT0-3 1950.587538 1950.587538 1950.587538 ZT4-7 797.778841 797.778841 797.778841 ZT8-11 44.1466675 44.1466675 44.1466675 ZT12-15 462.7754435 462.7754435 462.7754435 ZT16-19 17.103254 17.103254 17.103254 ZT20-23 21.629345 21.629345 21.629345