question archive The lead concentrations upstream from five power plants compared with the levels downstream from the same plants
The lead concentrations upstream from five power plants compared with the levels downstream from the same plants
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The lead concentrations upstream from five power plants compared with the levels downstream from the same plants. Which inference will be required?
a) Single sample
b) Matched pairs
c) Two independent samples
d) None of the above
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The correct answer to the given question is option b) Matched pairs.
In the given scenario, since one has to compare the lead concentrations measured both upstream and downstream are from the same five power plants (i.e. related or dependent samples), the matched pair test will be required.
The two independent sample inference is required when one has to draw comparison between entirely unrelated samples.
