condition mean min max ZT0-3 143.70325000000003 140.2195 147.187 ZT4-7 90.75205 90.75205 90.75205 ZT8-11 23.5006 23.5006 23.5006 ZT12-15 0 0 0 ZT16-19 15.499199999999998 15.499199999999998 15.499199999999998 ZT20-23 67.42055 67.42055 67.42055