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The test statistic to be employed is the one-tailed t-test (Zar, 1974). The equation for <br />the test is as follows: <br />t = abs value[Xreference area ' Xarea 1 ] <br />Sxt-x2 <br />where: <br />Xbaz= sample mean <br />S =sample standazd deviation <br />n =number of samples <br />SzP = (vZtSZt+vzzSz~/ vet+v22 pooled variance <br />Sxt-xz= sgrt[SZp(nt+nyntn~] standazd error of the difference between the <br />means <br />The values aze: <br /> Area 1 Reference Area <br />Xbar 18.60 22.67 <br />S 2.12 4.21 <br />n 10 12 <br />v 9 11 <br />SZP = (vZtSZt+v2ZSz~/ v2t+v2z = l(9)2(2.12)2+(1192(4.2192]/(q)2+(11)2 <br />SZP = 12.42 <br />Sxt_~= sgrt[SZp(nt+nyntnZ)] = sgrt[12.42[10+12/(10)(12)]] = sgrt[2.28] <br />Sxt-x2= I.51 <br />The t test equation with the samp]e cover data becomes: <br />t = [18.60-(0.9)x(22.67)]!1.51 <br />t = 1.19 <br />12 <br />