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Sutey Reference Area #1 <br />Noxious Weed Density Sample Means - 1998-2001 <br />1998 1999 2000 2001 <br />Thistle per square <br />meter 17.5 13.9 4.7 1 <br />Noxious Species <br />Combined per <br />square meter 14,9 5.3 1.9 •• <br />'From 1998 to 2001, thistle density sample mean <br />declined by 94%; true mean declined by at least 89%, <br />at the 95% level of statistical confidence. <br />"From 1999 to 2001, combined noxious weed density <br />sample mean declined by 87%; true mean declined by <br />at least 65%, at the 95% level of statistical confidence. <br />TABLE <br />