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 0.00550875 0.0 0.0110175 ZT16-19 0.0160334 0.0160334 0.0160334 ZT20-23 0.0 0.0 0.0