condition mean min max ZT0-3 22.45 22.45 22.45 ZT4-7 41.2 41.2 41.2 ZT8-11 55.150000000000006 55.150000000000006 55.150000000000006 ZT12-15 47.35 47.35 47.35 ZT16-19 38.75 38.75 38.75 ZT20-23 37.900000000000006 37.900000000000006 37.900000000000006