condition mean min max ZT0-3 23.2 23.2 23.2 ZT4-7 31.2 31.2 31.2 ZT8-11 32.35 32.35 32.35 ZT12-15 50.650000000000006 50.650000000000006 50.650000000000006 ZT16-19 74.6 74.6 74.6 ZT20-23 49.150000000000006 49.150000000000006 49.150000000000006