condition mean min max ZT0-3 15.172102500000001 11.618705 18.7255 ZT4-7 0.969165 0.969165 0.969165 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 4.368055 4.368055 4.368055 ZT20-23 10.65895 10.65895 10.65895