condition mean min max ZT0-3 21.601633333333332 20.1648 22.6342 ZT4-7 25.504800000000003 25.504800000000003 25.504800000000003 ZT8-11 30.0751 30.0751 30.0751 ZT12-15 36.0863 32.30315 39.86945 ZT16-19 32.0196 32.0196 32.0196 ZT20-23 25.2365 25.2365 25.2365