condition mean min max ZT0-3 0.63264 0.0 1.26528 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 4.96671 4.96671 4.96671 ZT20-23 0.0 0.0 0.0