condition mean min max ZT0-3 8.365852499999999 7.493869999999999 9.237835 ZT4-7 71.87555 71.87555 71.87555 ZT8-11 50.185649999999995 50.185649999999995 50.185649999999995 ZT12-15 0 0 0 ZT16-19 14.718865 14.718865 14.718865 ZT20-23 13.601775 13.601775 13.601775