condition mean min max ZT0-3 3.3550225 3.297785 3.41226 ZT4-7 2.47936 2.47936 2.47936 ZT8-11 2.896255 2.896255 2.896255 ZT12-15 0 0 0 ZT16-19 3.353215 3.353215 3.353215 ZT20-23 3.246265 3.246265 3.246265