condition mean min max ZT0-3 1767.4 1767.4 1767.4 ZT4-7 1827.9 1827.9 1827.9 ZT8-11 1766.65 1766.65 1766.65 ZT12-15 1618.35 1618.35 1618.35 ZT16-19 2039.85 2039.85 2039.85 ZT20-23 2116.6499999999996 2116.6499999999996 2116.6499999999996