condition mean min max ZT0-3 1036.453907 1036.453907 1036.453907 ZT4-7 580.0406975 580.0406975 580.0406975 ZT8-11 552.0270405 552.0270405 552.0270405 ZT12-15 860.960146 860.960146 860.960146 ZT16-19 947.449522 947.449522 947.449522 ZT20-23 706.722411 706.722411 706.722411