condition mean min max ZT0-3 0.446753 0.4444185 0.44908750000000003 ZT4-7 0.0 0.0 0.0 ZT8-11 0.088829 0.088829 0.088829 ZT12-15 0 0 0 ZT16-19 0.2652395 0.2652395 0.2652395 ZT20-23 0.0884275 0.0884275 0.0884275