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DRAFT REVEGETATION RULES 10/05/01 <br /> t = The (a=.10) t-table value for a I tail t-test, n-1 df <br /> (b) If the reclaimed area sample mean is less than 90% of the relevant <br /> standard, a one sided t-test with alpha error probability of.]0 shall be used <br /> to demonstrate that the reclaimed area mean is not less than 90% of the <br /> applicable success standard with 90% statistical confidence. If the basic <br /> assumption, or null hypothesis, of equality between the reclaimed area and <br /> 90% of the standard is not rejected by the test, then reclamation is <br /> considered successful for the parameter tested. This is the "standard null" <br /> approach to the t-test. Sample size adequacy must be demonstrated using <br /> the formula in (a) above. A minimum of 15 sample observations shall be <br /> taken even if statistical sample adequacy is achieved with fewer <br /> observations. <br /> (c) If the reclaimed area sample mean is greater than 90% of the standard, and <br /> sample adequacy is not demonstrated using the formula in (a), success may <br /> be demonstrated by use of the reverse null. Under the reverse null <br /> approach, a one sided t-test with alpha error probability of.10, is used to <br /> demonstrate that the reclaimed area mean is greater than 90% of the <br /> relevant success standard with 90% statistical confidence. The basic <br /> assumption, or null hypothesis, is that the reclaimed area mean is less than <br /> or equal to 90% of the standard. If the null hypothesis of equality is <br /> rejected by the test, then reclamation is considered successful for the <br /> parameter tested. A minimum sample size of thirty is required. <br /> (d) For woody plant density a reverse null approach based on the median is <br /> allowable. In this approach, it must be demonstrated that the lower 90% <br /> confidence limit on the reclaimed area median is greater than 90% of the <br /> relevant success standard. A minimum sample size of 30 is required. <br /> (e) Demonstrations of sample adequacy and revegetation success shall be made <br /> using the following formulas,when the 2-stage sampling design is <br /> employed. <br /> A description of this method with the appropriate formulas for sample <br /> adequacy and the test for success are needed. <br /> WILDLIFE <br /> 15. Amend Rule 2.07.6(l)(a)(ii) as follows: <br /> [C,9j <br /> 14 <br />