condition mean min max ZT0-3 0.8878549017499999 0.70495655 1.0707532535 ZT4-7 1.502830932 1.2847770614999998 1.7208848025 ZT8-11 1.4486271575 1.4170008250000001 1.48025349 ZT12-15 1.52583522875 1.2454684215 1.8062020360000002 ZT16-19 1.5068130334999998 1.2759190285 1.7377070385 ZT20-23 2.52509928375 2.2786881064999998 2.771510461