condition mean min max ZT0-3 0.808465 0.668433 0.9484969999999999 ZT4-7 0.892896 0.892896 0.892896 ZT8-11 0.7581995 0.7581995 0.7581995 ZT12-15 0 0 0 ZT16-19 1.143646 1.143646 1.143646 ZT20-23 1.538305 1.538305 1.538305