condition mean min max ZT0-3 281.351475625 181.72732155 380.97562969999996 ZT4-7 36.199512688249996 20.4138832315 51.985142145 ZT8-11 2.9541278335000003 1.2723010934999999 4.6359545735 ZT12-15 3.4306033522499995 2.9872221989999996 3.8739845054999997 ZT16-19 10.3095595835 7.515920084 13.103199083 ZT20-23 24.3883427775 15.24432354 33.532362015000004