condition mean min max ZT0-3 3014.75 3014.75 3014.75 ZT4-7 3113.7 3113.7 3113.7 ZT8-11 2857.5 2857.5 2857.5 ZT12-15 2854.45 2854.45 2854.45 ZT16-19 3187.25 3187.25 3187.25 ZT20-23 3454.3 3454.3 3454.3