condition mean min max ZT0-3 0.21743922499999999 0.06273245 0.372146 ZT4-7 0.4068395 0.4068395 0.4068395 ZT8-11 0.37653349999999997 0.37653349999999997 0.37653349999999997 ZT12-15 0 0 0 ZT16-19 0.955827 0.955827 0.955827 ZT20-23 0.7438645 0.7438645 0.7438645