condition mean min max ZT0-3 38.7 38.7 38.7 ZT4-7 44.7 44.7 44.7 ZT8-11 30.95 30.95 30.95 ZT12-15 48.75 48.75 48.75 ZT16-19 64.7 64.7 64.7 ZT20-23 42.599999999999994 42.599999999999994 42.599999999999994