condition mean min max ZT0-3 0.0243178 0.0243178 0.0243178 ZT4-7 0.00591955 0.00591955 0.00591955 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0157297 0.0157297 0.0157297 ZT16-19 0.024350133333333333 0.024350133333333333 0.024350133333333333 ZT20-23 0.009047600000000001 0.009047600000000001 0.009047600000000001