condition mean min max ZT0-3 55.3 55.3 55.3 ZT4-7 76.8 76.8 76.8 ZT8-11 44.4 44.4 44.4 ZT12-15 27.9 27.9 27.9 ZT16-19 61.45 61.45 61.45 ZT20-23 35.650000000000006 35.650000000000006 35.650000000000006