condition mean min max ZT0-3 0.50074475 0.464801 0.5366885 ZT4-7 1.602165 1.602165 1.602165 ZT8-11 37.64155 37.64155 37.64155 ZT12-15 0 0 0 ZT16-19 11.351040000000001 11.351040000000001 11.351040000000001 ZT20-23 2.108145 2.108145 2.108145