condition mean min max ZT0-3 66.991219 66.991219 66.991219 ZT4-7 70.69262649999999 70.69262649999999 70.69262649999999 ZT8-11 81.168149 81.168149 81.168149 ZT12-15 57.1561555 57.1561555 57.1561555 ZT16-19 66.3330135 66.3330135 66.3330135 ZT20-23 66.5944465 66.5944465 66.5944465