condition mean min max ZT0-3 0.5142416666666667 0.283344 0.6468435 ZT4-7 0.6718729999999999 0.6718729999999999 0.6718729999999999 ZT8-11 0.376729 0.376729 0.376729 ZT12-15 0.8284535 0.670047 0.9868600000000001 ZT16-19 0.415225 0.415225 0.415225 ZT20-23 0.5699755 0.5699755 0.5699755