condition mean min max ZT0-3 154.635053 154.635053 154.635053 ZT4-7 120.42370349999999 120.42370349999999 120.42370349999999 ZT8-11 104.4894705 104.4894705 104.4894705 ZT12-15 97.364007 97.364007 97.364007 ZT16-19 72.160773 72.160773 72.160773 ZT20-23 78.31142399999999 78.31142399999999 78.31142399999999