condition mean min max ZT0-3 44.599999999999994 44.599999999999994 44.599999999999994 ZT4-7 7.3 7.3 7.3 ZT8-11 47.3 47.3 47.3 ZT12-15 44.75 44.75 44.75 ZT16-19 28.15 28.15 28.15 ZT20-23 34.75 34.75 34.75