condition mean min max ZT0-3 0.2944915 0.0 0.4496375 ZT4-7 0.652282 0.652282 0.652282 ZT8-11 1.562805 1.562805 1.562805 ZT12-15 1.9413325 1.61882 2.263845 ZT16-19 2.552505 2.552505 2.552505 ZT20-23 0.0 0.0 0.0