condition mean min max ZT0-3 10.141265 10.141265 10.141265 ZT4-7 27.424111 27.424111 27.424111 ZT8-11 104.879797 104.879797 104.879797 ZT12-15 31.1628625 31.1628625 31.1628625 ZT16-19 13.5424315 13.5424315 13.5424315 ZT20-23 15.485264 15.485264 15.485264