condition mean min max ZT0-3 0.46982999999999997 0.330865 0.692915 ZT4-7 0.3426515 0.3426515 0.3426515 ZT8-11 0.0 0.0 0.0 ZT12-15 0.3707565 0.0 0.741513 ZT16-19 0.76821 0.76821 0.76821 ZT20-23 0.0 0.0 0.0