Question

Refer to Exercise 6.46. Answer the following questions using the combined data for both depths.
a. Use the Wilcoxon rank sum test to assess whether there is a difference in population abundances between the sites within and outside the oil trajectory. Use α = .05.
b. What are the required conditions for the techniques used in part (a)?
c. Are the required conditions satisfied?
d. Discuss any differences in the conclusions obtained using the t procedures and the Wilcoxon rank sum test.


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  • CreatedNovember 21, 2015
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