condition mean min max ZT0-3 0.9850645 0.9850645 0.9850645 ZT4-7 0.7335375 0.7335375 0.7335375 ZT8-11 0.651456 0.651456 0.651456 ZT12-15 0.777245 0.777245 0.777245 ZT16-19 1.280965 1.280965 1.280965 ZT20-23 1.0750045 1.0750045 1.0750045