condition mean min max ZT0-3 28.65 28.65 28.65 ZT4-7 30.6 30.6 30.6 ZT8-11 35.650000000000006 35.650000000000006 35.650000000000006 ZT12-15 13.8 13.8 13.8 ZT16-19 64.9 64.9 64.9 ZT20-23 57.75 57.75 57.75