condition mean min max ZT0-3 22.75 22.75 22.75 ZT4-7 51.6 51.6 51.6 ZT8-11 65.15 65.15 65.15 ZT12-15 49.150000000000006 49.150000000000006 49.150000000000006 ZT16-19 61.0 61.0 61.0 ZT20-23 53.150000000000006 53.150000000000006 53.150000000000006