condition mean min max ZT0-3 66.395806 66.395806 66.395806 ZT4-7 124.050951 124.050951 124.050951 ZT8-11 148.4304045 148.4304045 148.4304045 ZT12-15 129.46697699999999 129.46697699999999 129.46697699999999 ZT16-19 102.083876 102.083876 102.083876 ZT20-23 103.638067 103.638067 103.638067