condition mean min max ZT0-3 2781.3 2781.3 2781.3 ZT4-7 3352.5 3352.5 3352.5 ZT8-11 3046.2 3046.2 3046.2 ZT12-15 2976.9 2976.9 2976.9 ZT16-19 2671.95 2671.95 2671.95 ZT20-23 2725.75 2725.75 2725.75