condition mean min max ZT0-3 33.05 33.05 33.05 ZT4-7 49.6 49.6 49.6 ZT8-11 45.65 45.65 45.65 ZT12-15 32.900000000000006 32.900000000000006 32.900000000000006 ZT16-19 40.65 40.65 40.65 ZT20-23 67.05 67.05 67.05