condition mean min max ZT0-3 36.012025 34.37465 37.6494 ZT4-7 35.34695 35.34695 35.34695 ZT8-11 92.5918 92.5918 92.5918 ZT12-15 0 0 0 ZT16-19 93.3247 93.3247 93.3247 ZT20-23 66.61330000000001 66.61330000000001 66.61330000000001