condition mean min max ZT0-3 0.5790285 0.26910449999999997 0.7520045 ZT4-7 0.33286 0.33286 0.33286 ZT8-11 0.541719 0.541719 0.541719 ZT12-15 0.7414245 0.652965 0.8298840000000001 ZT16-19 1.0239875 1.0239875 1.0239875 ZT20-23 0.7923425 0.7923425 0.7923425