condition mean min max ZT0-3 0.0445745 0.0 0.089149 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0888065 0.0888065 0.0888065 ZT20-23 0.0 0.0 0.0