condition mean min max ZT0-3 2590.228016 2590.228016 2590.228016 ZT4-7 1908.73174 1908.73174 1908.73174 ZT8-11 2253.6510850000004 2253.6510850000004 2253.6510850000004 ZT12-15 1894.91608 1894.91608 1894.91608 ZT16-19 2330.6723285 2330.6723285 2330.6723285 ZT20-23 2102.6973905 2102.6973905 2102.6973905