condition mean min max ZT0-3 0.1544915 0.1544915 0.1544915 ZT4-7 0.319996 0.319996 0.319996 ZT8-11 0.21969249999999999 0.21969249999999999 0.21969249999999999 ZT12-15 0.32451149999999995 0.32451149999999995 0.32451149999999995 ZT16-19 0.428088 0.428088 0.428088 ZT20-23 0.2441855 0.2441855 0.2441855