condition mean min max ZT0-3 1015.1790000000001 1015.1790000000001 1015.1790000000001 ZT4-7 181.733 181.733 181.733 ZT8-11 306.9325 306.9325 306.9325 ZT12-15 508.90049999999997 508.90049999999997 508.90049999999997 ZT16-19 1194.59 1194.59 1194.59 ZT20-23 1365.26 1365.26 1365.26