condition mean min max ZT0-3 2819.9 2819.9 2819.9 ZT4-7 2643.2 2643.2 2643.2 ZT8-11 1963.8 1963.8 1963.8 ZT12-15 1903.05 1903.05 1903.05 ZT16-19 1909.6999999999998 1909.6999999999998 1909.6999999999998 ZT20-23 2364.45 2364.45 2364.45