condition mean min max ZT0-3 0.008842866833333332 0.0 0.017685733666666665 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0088854305 0.0 0.017770861 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.010402232999999999 0.0 0.020804465999999997