Dirt livestock tanks can support migratory birds on their journeys. A typical livestock tank supports 14 different migratory bird species, with a standard deviation of 2.6 species. Dr.Frank wants to estimate the number of species using dirt tanks in the Trans-Pecos. How many tanks does she need to survey to be 95% confident (critical value = 1.96) in estimating the mean number of migratory bird species using each tank to within 1 species?
Added by Heidi G.
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We have: - Desired confidence level: 95% (which corresponds to a critical value \( z = 1.96 \)) - Standard deviation (\( \sigma \)): 2.6 species - Margin of error (\( E \)): 1 species Show more…
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