condition mean min max ZT0-3 126.851686 126.851686 126.851686 ZT4-7 152.432837 152.432837 152.432837 ZT8-11 179.96441049999999 179.96441049999999 179.96441049999999 ZT12-15 196.17420550000003 196.17420550000003 196.17420550000003 ZT16-19 182.6951105 182.6951105 182.6951105 ZT20-23 228.26460600000001 228.26460600000001 228.26460600000001