condition mean min max ZT0-3 36.2255 36.2255 36.2255 ZT4-7 33.93215 33.93215 33.93215 ZT8-11 19.1438 19.1438 19.1438 ZT12-15 20.25825 20.25825 20.25825 ZT16-19 26.814799999999998 26.814799999999998 26.814799999999998 ZT20-23 45.5403 45.5403 45.5403