Concept explainers
a.
Identify the variables measured as quantitative or qualitative.
b.
Identify the experimental unit.
c.
Describe the percentage of transects in oiled and unoiled areas using a pie chart.
d.
Examine the relationship between observed numbers of seabirds and transect lengths using the graphical method.
e.
Check whether the distribution of seabird densities differs for transects in oiled and unoiled areas.
f.
Find an interval of values that is likely to contain at least 75% of the seabirds’ densities for unoiled transects.
g.
Find an interval of values that is likely to contain at least 75% of the seabird’s densities for oiled transects.
h.
Identify and explain the type of transect, an oiled or unoiled one, is more likely to have a seabird density of 16.
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Statistics (13th Edition)
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