condition mean min max ZT0-3 0.365959903 0.0 0.731919806 ZT4-7 0.3100100495 0.148497964 0.47152213499999995 ZT8-11 0.19618567999999997 0.1526398845 0.23973147549999996 ZT12-15 0.31118925675 0.2913138635 0.33106464999999996 ZT16-19 0.70016324325 0.6088566075 0.7914698790000001 ZT20-23 0.979655382 0.87702507 1.082285694