Laserfiche WebLink
Since critical tt = 0.851 (one -tailed, alpha = 0.2, 40-1 df) and ",, (0.951) is greater than this critical value, <br />reclamation success for "Volunteer" woody plant density for Phase III in 2015 is demonstrated on 100% of <br />the unfenced BRB-3. <br />Fenced Aspen "Concentration"Area Density <br />Sample adequacy based on woody plant density was not achieved in the Fenced Aspen "Concentration" <br />areas of the Phase III BRB-3. Since the mean density exceeded the standard and adequacy was not <br />achieved, use of a reverse -null t-test of the assertion that the 2015 BRB-3 Fenced Aspen "Concentration" <br />woody plant density exceeds 90% of the standard. The 2015 BRB-3 Fenced Aspen "Concentration" <br />woody plant density data were first evaluated for normality using the Shapiro-Francia test. Based on the <br />2015 Aspen "Concentration" density data the normality test was not passed. Consequently a square root <br />transformation was performed and the normality test was passed (Table 4, below). Hypothesis testing <br />calculations went forward using square root transformed data for both the BRB-3 Fenced Aspen <br />"Concentration" density data and the technical standard. <br />Table 4. Summary of Results from Shapiro-Francia Test Evaluating Assumption of Normal Woody <br />Plant Density Data Distribution <br />Vegetation <br />Parameter <br />Values <br />Shapiro-Francia Test for Normality <br />Pass ? <br />Mean' <br />N <br />Calculated "W" <br />Critical "W" <br />Yes / No <br />2015 BRB-3 Fenced <br />Aspen <br />"Concentration" <br />46.9 <br />40 <br />0.952 <br />0.919 <br />Yes <br />Woody Plant Density <br />Data <br />' 2015 Fenced Aspen "Concentration" area individual density data were subjected to square root transformation to produce a <br />normal data set. Mean shown here is the square root mean of the lbs/acre data. <br />tc _ <br />Y— (0.9 * technical standard) <br />(�n) <br />28 <br />