condition mean min max ZT0-3 13.350495 13.350495 13.350495 ZT4-7 10.9926765 10.9926765 10.9926765 ZT8-11 13.217547 13.217547 13.217547 ZT12-15 51.7200585 51.7200585 51.7200585 ZT16-19 11.9171185 11.9171185 11.9171185 ZT20-23 28.4140195 28.4140195 28.4140195