condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.050832999999999996 0.050832999999999996 0.050832999999999996 ZT8-11 0.0390395 0.0390395 0.0390395 ZT12-15 0.0 0.0 0.0 ZT16-19 0.03230925 0.03230925 0.03230925 ZT20-23 0.020652916666666667 0.020652916666666667 0.020652916666666667