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t, _ <br />� —Q <br />S- <br />If t, was greater than the 1- tailed t table value for alpha error probability of .20, with (n -1) degrees of <br />freedom then H would be rejected, and revegetation was deemed successful. <br />Were the mean allowable herbaceous cover of an adequate sample from the 2010 Phase II BRB less <br />than 90% of the cover standard (see above), then a one - sample t -test (using the reverse null hypothesis, <br />stated as H <_ Q)was made in the following form to test the hypothesis of reclamation success for <br />cover (CDMG 2005 revised rule, 4.15.11 (2)(b)): <br />t = Q - <br />x <br />S- <br />Where: z = Bond Release Block Sample Mean <br />Q = 90% of Standard <br />S- = Standard error of mean [ s / n ] <br />S = Sample standard deviation <br />n = Sample size <br />t = Calculated t value <br />t = Table t value (alpha = 0.2) see Rohlf and Sokal 1969 <br />Where: x = Bond Release Block Sample Mean <br />Q = 90% of Standard <br />S = Standard error of mean [ s / ,fin <br />S = Sample standard deviation <br />n = Sample size <br />t = Calculated t value <br />t = Tablet value (alpha = 0.1) see Rohlf and Sokal 1969 <br />The (traditional) null hypothesis being tested was that the bond release block mean (t) was statistically <br />indistinguishable from 90% of the standard, stated as H µ >_ Q. If the absolute value of t, was less than <br />6 <br />