condition mean min max ZT0-3 82.95 82.95 82.95 ZT4-7 20.8 20.8 20.8 ZT8-11 89.75 89.75 89.75 ZT12-15 52.900000000000006 52.900000000000006 52.900000000000006 ZT16-19 71.8 71.8 71.8 ZT20-23 95.1 95.1 95.1