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Thistle per square <br />meter <br />Noxious Species <br />Combined per <br />square meter <br />Sutey Reference Area #1 <br />Noxious Weed Density Sample Means - 1998 -2001 <br />1998 1999 2000 2001 <br />17.5 13.9 4.7 1 <br />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 />* <br />