condition mean min max ZT0-3 70.279265975 45.38699691 95.17153504 ZT4-7 225.547711975 211.84185195 239.253572 ZT8-11 382.080826225 247.99105515 516.1705973 ZT12-15 836.9971348249999 702.32353875 971.6707308999999 ZT16-19 350.996192025 293.3972981 408.59508595 ZT20-23 168.312030265 127.70147993 208.9225806