condition mean min max ZT0-3 58.9 58.9 58.9 ZT4-7 52.8 52.8 52.8 ZT8-11 33.85 33.85 33.85 ZT12-15 70.55000000000001 70.55000000000001 70.55000000000001 ZT16-19 86.5 86.5 86.5 ZT20-23 56.650000000000006 56.650000000000006 56.650000000000006