condition mean min max ZT0-3 44.51197 44.51197 44.51197 ZT4-7 37.965911500000004 37.965911500000004 37.965911500000004 ZT8-11 44.7602395 44.7602395 44.7602395 ZT12-15 43.965819499999995 43.965819499999995 43.965819499999995 ZT16-19 50.673435 50.673435 50.673435 ZT20-23 53.660764 53.660764 53.660764