condition mean min max ZT0-3 0.7260915 0.7260915 0.7260915 ZT4-7 0.9839819999999999 0.9839819999999999 0.9839819999999999 ZT8-11 0.593488 0.593488 0.593488 ZT12-15 0.508818 0.508818 0.508818 ZT16-19 0.14929304999999998 0.14929304999999998 0.14929304999999998 ZT20-23 0.279546 0.279546 0.279546