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Table 6. Regression Analysis of Age (Years) versus Size (Circimiference <br />at Breast Heiyht) for Aspen with a dbh* larger than 5.8 cm <br />Data <br />i Xi (cbh-cm) dbh-cm Yi (aye-years) <br />1 91.5 29.1 116 <br />2 76.2 24.3 104 <br />3 70.l 22.3 112 <br />4 42.5 13.5 67 <br />5 18.5 5.9 17 <br />6 63.8 20.3 83 <br />7 74.3 23.7 48 <br />8 28.7 9.1 55 <br />9 54.7 17.4 51 <br />10 86.7 27.6 78 <br />11 106.5 33.9 98 <br />12 69.9 22.2 86 <br />13 34.8 11.1 50 <br />14 63.5 20.2 73 <br />Averages 63.0 20.0 74.1 <br />~• Analysis of Variance: Linear Regression of Y on X <br />Source SS DF MS F Ratio <br />Regression 6043.151 1 6043.151 16.78 <br />Residual 4322.563 12 360.214 <br />Zbtal Corr. 10365.714 13 <br />F(1, 12) = 9.33 a = 0.01 <br />2 <br />R = 0.583 = 58.30 <br />Y = 19.771 + 0.863•„ <br /> <br />*dbh = diameter breast high <br />( • <br />-39- <br />