condition mean min max ZT0-3 179.546154 179.546154 179.546154 ZT4-7 194.04148750000002 194.04148750000002 194.04148750000002 ZT8-11 218.11211600000001 218.11211600000001 218.11211600000001 ZT12-15 224.0012875 224.0012875 224.0012875 ZT16-19 239.5201815 239.5201815 239.5201815 ZT20-23 275.57882 275.57882 275.57882