condition mean min max ZT0-3 39.0 39.0 39.0 ZT4-7 29.7 29.7 29.7 ZT8-11 44.0 44.0 44.0 ZT12-15 75.94999999999999 75.94999999999999 75.94999999999999 ZT16-19 75.6 75.6 75.6 ZT20-23 51.400000000000006 51.400000000000006 51.400000000000006