condition mean min max ZT0-3 30.85 30.85 30.85 ZT4-7 50.1 50.1 50.1 ZT8-11 27.1 27.1 27.1 ZT12-15 51.900000000000006 51.900000000000006 51.900000000000006 ZT16-19 47.95 47.95 47.95 ZT20-23 48.900000000000006 48.900000000000006 48.900000000000006