condition mean min max ZT0-3 0.5240166666666667 0.0 1.57205 ZT4-7 0.0 0.0 0.0 ZT8-11 1.62063 1.62063 1.62063 ZT12-15 0.3043925 0.0 0.608785 ZT16-19 1.56531 1.56531 1.56531 ZT20-23 1.702145 1.702145 1.702145