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freedom (nl + nZ - 2). If the computed value exceeded the tabular value <br />• then the means were shown to be significantly different at the 95% confi- <br />dence level and the null hypothesis was accepted. Table 10 summarizes <br />these calculations. <br />In no case were the tested means significantly different. In the case of <br />biomass on the aspen area and cover on the sagebrush area, the reference <br />area values were higher than on the mine area. For biomass on the sage- <br />brush area, the mine area value was greater than on the reference area, <br />however, this should be acceptable since the means were not significantly <br />different at the 95% confidence level. <br />u <br /> <br />637C6 <br />