condition mean min max ZT0-3 35.462999999999994 35.462999999999994 35.462999999999994 ZT4-7 28.30415 28.30415 28.30415 ZT8-11 22.797849999999997 22.797849999999997 22.797849999999997 ZT12-15 20.5166 20.5166 20.5166 ZT16-19 24.6009 24.6009 24.6009 ZT20-23 37.055049999999994 37.055049999999994 37.055049999999994