condition mean min max ZT0-3 0.9346945 0.9346945 0.9346945 ZT4-7 0.8709555 0.8709555 0.8709555 ZT8-11 0.3147845 0.3147845 0.3147845 ZT12-15 0.7655665 0.7655665 0.7655665 ZT16-19 0.7004750000000001 0.7004750000000001 0.7004750000000001 ZT20-23 1.098293 1.098293 1.098293