condition mean min max ZT0-3 42.545296 42.545296 42.545296 ZT4-7 47.6559205 47.6559205 47.6559205 ZT8-11 48.4125755 48.4125755 48.4125755 ZT12-15 53.487883 53.487883 53.487883 ZT16-19 42.980132499999996 42.980132499999996 42.980132499999996 ZT20-23 51.406775499999995 51.406775499999995 51.406775499999995