condition mean min max ZT0-3 73.6677 73.6677 73.6677 ZT4-7 83.08585 83.08585 83.08585 ZT8-11 52.48995 52.48995 52.48995 ZT12-15 28.8523 28.8523 28.8523 ZT16-19 27.2581 27.2581 27.2581 ZT20-23 44.99395 44.99395 44.99395