condition mean min max ZT0-3 1.2876625 1.2876625 1.2876625 ZT4-7 0.870394 0.870394 0.870394 ZT8-11 2.087685 2.087685 2.087685 ZT12-15 2.56121 2.56121 2.56121 ZT16-19 2.6578299999999997 2.6578299999999997 2.6578299999999997 ZT20-23 1.507185 1.507185 1.507185