condition mean min max ZT0-3 10.0828 10.0828 10.0828 ZT4-7 6.6418 6.6418 6.6418 ZT8-11 7.94472 7.94472 7.94472 ZT12-15 10.7747 10.7747 10.7747 ZT16-19 13.5241 13.5241 13.5241 ZT20-23 9.893844999999999 9.893844999999999 9.893844999999999