condition mean min max ZT0-3 0.37174549999999995 0.37174549999999995 0.37174549999999995 ZT4-7 0.293786 0.293786 0.293786 ZT8-11 0.0479019 0.0479019 0.0479019 ZT12-15 0.0 0.0 0.0 ZT16-19 0.051874 0.051874 0.051874 ZT20-23 0.17892399999999997 0.17892399999999997 0.17892399999999997