condition mean min max ZT0-3 1725.5 1725.5 1725.5 ZT4-7 2674.9 2674.9 2674.9 ZT8-11 2437.85 2437.85 2437.85 ZT12-15 2322.8 2322.8 2322.8 ZT16-19 2151.3999999999996 2151.3999999999996 2151.3999999999996 ZT20-23 1899.6 1899.6 1899.6