condition mean min max ZT0-3 80.450175 66.0412 94.85915 ZT4-7 68.9798 68.9798 68.9798 ZT8-11 15.9467 15.9467 15.9467 ZT12-15 0 0 0 ZT16-19 17.845675 17.845675 17.845675 ZT20-23 64.55590000000001 64.55590000000001 64.55590000000001