condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.200656625 0.17008500000000001 0.23122825 ZT16-19 0.121683 0.0 0.243366 ZT20-23 0 0 0