condition mean min max ZT0-3 36.585899999999995 35.562 37.6098 ZT4-7 34.68185 34.68185 34.68185 ZT8-11 30.80585 30.80585 30.80585 ZT12-15 0 0 0 ZT16-19 17.98945 17.98945 17.98945 ZT20-23 21.09735 21.09735 21.09735