condition mean min max ZT0-3 0.0514342 0.0 0.1028684 ZT4-7 0.0171094 0.0171094 0.0171094 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0350860375 0.011772075 0.0584 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0