Following the March 24, 1989, grounding of the tanker Exxon Valdez in Alaska, approximately 35,500 tons of
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a. After combining the data from the two depths, does there appear to be a difference in population mean abundances between the sites within and outside the oil trajectory? Use α = .05.
b. Estimate the size of the difference in the mean population abundances at the two types of sites using a 95% confidence interval.
c. What are the required conditions for the techniques used in parts (a) and (b)?
d. Check to see whether the required conditions are satisfied.
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Related Book For
An Introduction To Statistical Methods And Data Analysis
ISBN: 9781305465527
7th Edition
Authors: R. Lyman Ott, Micheal T. Longnecker
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