condition mean min max ZT0-3 41.95 41.95 41.95 ZT4-7 45.1 45.1 45.1 ZT8-11 60.900000000000006 60.900000000000006 60.900000000000006 ZT12-15 45.95 45.95 45.95 ZT16-19 55.55 55.55 55.55 ZT20-23 67.25 67.25 67.25