condition mean min max ZT0-3 123.462826 123.462826 123.462826 ZT4-7 99.7173045 99.7173045 99.7173045 ZT8-11 159.432952 159.432952 159.432952 ZT12-15 129.798578 129.798578 129.798578 ZT16-19 148.80678899999998 148.80678899999998 148.80678899999998 ZT20-23 144.554719 144.554719 144.554719