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Table 12. Means (in ~/acre), standard deviations, number of samples taken <br />and needed to meet suggested level of adequacy and Level of adequacy attained <br />~ for tree density studies on the study area. <br />' Adequacy <br />Vegetation Type z s N Ns Attained <br />Pinyon-Juniper 220.6 230.4 30 39 .773 <br />r Pinyon-Juniper-control 354.7 288.9 30 24 .823 <br />z =sample mean <br />s =sample standard deviation <br />N =number of samples taken <br />_ NS = number of samples needed for suggested sample adequacy based on density <br />-.• <br />.; <br />- 33 - <br />