condition mean min max ZT0-3 0.4299668341666666 0.247505649 0.6124280193333332 ZT4-7 0.9600342735 0.0 1.920068547 ZT8-11 0.33078037050000003 0.0 0.6615607410000001 ZT12-15 0.024828838000000002 0.0 0.049657676000000005 ZT16-19 0.11637634349999999 0.049220656 0.18353203099999998 ZT20-23 0.33697169083333334 0.04291095833333333 0.6310324233333333