condition mean min max ZT0-3 0.19472931583333333 0.016931009666666667 0.372527622 ZT4-7 0.017815476166666667 0.016589946333333334 0.019041006 ZT8-11 0.0 0.0 0.0 ZT12-15 0.00949224 0.0 0.01898448 ZT16-19 0.007567314500000001 0.0 0.015134629000000002 ZT20-23 0.0 0.0 0.0