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' m = number of secondary unit elements (2 m X 50 m sample transects) actually sampled within <br />' each primary unit 3 <br />Confidence Limits <br />' Confidence limits for comparisons to reference areas were calculated using a 1-tailed t-value for <br />alpha error probability of 0.10 at (n-1) degrees of freedom multiplied by the standard error of the <br />mean of the sampled area. <br />' C.I.=t, s <br />. Jn <br />Post-Mining Comparison without Hypothesis Testing <br />When the parameter mean for the bond release block was at least 90% of the calculated success <br />standard or approved technical standard, then revegetation was considered successful for that <br />parameter and no other statistical calculations were made. <br />Post-Mining Comparison with Hypothesis Testing <br />When the parameter sample mean for the bond release block was less than 90 percent of the <br />-standard, hypothesis testing was employed to test the statistical significance of this difference at <br />the 90 percent confidence level (CMLRB, 1995). The following test was employed: <br />Null Hypothesis H°: Revegetated area cover is greater than or equal to reference area standard, <br />Ha: µ _> Q <br />Alternate Hypothesis H,: Revegetated area cover is less than reference area standard. <br />HA: µ <Q <br />tc- Q'X <br />sx <br />k = Calculated t value <br />Q = 90% of the standard <br />x =Bond release block sample mean <br />n =Sample size <br />