condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.04021375 0.04021375 0.04021375 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.04050865 0.04050865 0.04050865