condition mean min max ZT0-3 431.25042 431.25042 431.25042 ZT4-7 185.1010035 185.1010035 185.1010035 ZT8-11 71.88843299999999 71.88843299999999 71.88843299999999 ZT12-15 114.299262 114.299262 114.299262 ZT16-19 52.568642999999994 52.568642999999994 52.568642999999994 ZT20-23 36.8358825 36.8358825 36.8358825