condition mean min max ZT0-3 0.21895599999999998 0.0 0.43791199999999997 ZT4-7 0.024927 0.024927 0.024927 ZT8-11 0.0 0.0 0.0 ZT12-15 0.035249875 0.0 0.07049975 ZT16-19 0.050956 0.0 0.101912 ZT20-23 0 0 0