condition mean min max ZT0-3 43.15 43.15 43.15 ZT4-7 37.1 37.1 37.1 ZT8-11 54.0 54.0 54.0 ZT12-15 48.400000000000006 48.400000000000006 48.400000000000006 ZT16-19 43.0 43.0 43.0 ZT20-23 25.0 25.0 25.0