condition mean min max ZT0-3 11.514325 10.489650000000001 12.539 ZT4-7 18.41545 18.41545 18.41545 ZT8-11 29.92235 29.92235 29.92235 ZT12-15 0 0 0 ZT16-19 27.86905 27.86905 27.86905 ZT20-23 14.1665 14.1665 14.1665