condition mean min max ZT0-3 3190.797402 3190.797402 3190.797402 ZT4-7 2853.1897305 2853.1897305 2853.1897305 ZT8-11 2619.324084 2619.324084 2619.324084 ZT12-15 2313.2527099999998 2313.2527099999998 2313.2527099999998 ZT16-19 2659.5904419999997 2659.5904419999997 2659.5904419999997 ZT20-23 2291.7156864999997 2291.7156864999997 2291.7156864999997