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<br />p. 3 <br />Trinidad Basin Dline <br />April 27, 1981 <br />~ This formula lessens the chance that sample adequacy will be achieved <br />~ (by the formula) without actually achieving an adequate level of confidence <br />~ for the sampled population. <br />J B. The applicant must use a t(z) value based on the type of community <br />1 ~ sampled (i.e. woody or herbaceous). A t value of 1.645 (90%, two-tailed) <br />I ,, is appropriate for herbaceous communities, while 1.282 (80I, two-tailed) <br />is appropriate for woody community types. <br />C. S2 is not the level of accuracy, but the variance obtained from <br />l <br />~ the sample of the population. <br />I <br />D. D2 is actually (dX)2 where d is the level of accuracy (101 in all <br />of our cases) and R is the sample mean of the population sampled. <br />4. Rather than utilize the sample adequacy formula as the determinate <br />as to whether an adequate sample has been obtained the applicant should <br />calculate (and provide to the Division) the level of confidence obtained <br />for the sampling for each parameter in each vegetation type. <br />5. The applicant must provide either cover or production data by species. <br />6. The cover data to be supplied should delineate total cover for communities <br />sampled. <br />7. The applicant should provide a description of the point-centered quarter <br />method to be utilized to sample woody plant density, since there are numerous <br />variations of this method. <br />8. At the time of sampling (and at any time thereafter), the applicant <br />should report to the Division the encountering of any rare of endangered <br />plant species. <br />2.04.11 Fish and Wildlife Resources Information <br />1, Copies of discussions/contacts with the Colorado Division of Wildlife <br />should be provided if available. <br />