condition mean min max ZT0-3 9.260874 9.260874 9.260874 ZT4-7 11.127994 11.127994 11.127994 ZT8-11 10.242218000000001 10.242218000000001 10.242218000000001 ZT12-15 11.862172 11.862172 11.862172 ZT16-19 11.141645 11.141645 11.141645 ZT20-23 13.503519 13.503519 13.503519