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{ <br />Using Warren Keammers Standard of 31.95 for Q <br />Pooled Vegetation Cover for Reclaimed Areas <br />Mean - 29/112 x 32.6 + 83/112 x 30.6 ~ 31.121 <br />degrees of freedom = (15-1)+(20-1)= 33 <br />Standard Error of Weighted Sample Mean (Sx) <br />Square root of <br />Square root= <br />calculated t= Q-pooled mean <br />Sx <br />((29/112)^2' (48.3/15))+((83/112)^2'(17.5/20)} <br />0.696822 <br />0.834759 <br />31.95-31.1. <br />0.83 <br />1.00 <br />df=33 <br />t alpha .1 = 1.308 <br />