condition mean min max ZT0-3 43.400000000000006 43.400000000000006 43.400000000000006 ZT4-7 48.2 48.2 48.2 ZT8-11 39.95 39.95 39.95 ZT12-15 35.0 35.0 35.0 ZT16-19 54.05 54.05 54.05 ZT20-23 46.35 46.35 46.35