condition mean min max ZT0-3 37.1656 37.1656 37.1656 ZT4-7 29.84955 29.84955 29.84955 ZT8-11 25.1826 25.1826 25.1826 ZT12-15 33.3862 33.3862 33.3862 ZT16-19 46.09855 46.09855 46.09855 ZT20-23 42.3959 42.3959 42.3959