condition mean min max ZT0-3 19.49015 13.579149999999998 24.002850000000002 ZT4-7 14.18965 14.18965 14.18965 ZT8-11 11.435300000000002 11.435300000000002 11.435300000000002 ZT12-15 16.01775 14.2148 17.820700000000002 ZT16-19 24.7944 24.7944 24.7944 ZT20-23 32.960800000000006 32.960800000000006 32.960800000000006