condition mean min max ZT0-3 0.21825 0.0 0.3313805 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 1.05446775 0.6926675 1.4162679999999999 ZT16-19 0.3102485 0.3102485 0.3102485 ZT20-23 0.3630705 0.3630705 0.3630705