condition mean min max ZT0-3 14.08845 13.114899999999999 15.062000000000001 ZT4-7 6.769885 6.769885 6.769885 ZT8-11 9.44696 9.44696 9.44696 ZT12-15 0 0 0 ZT16-19 12.212 12.212 12.212 ZT20-23 11.287700000000001 11.287700000000001 11.287700000000001