A cigarette manufacturer claims that the tar content of
Chapter 16, Problem 16.15(choose chapter or problem)
A cigarette manufacturer claims that the tar content of brand B cigarettes is lower than that of brand A cigarettes. To test this claim, the following determinations of tar content, in milligrams, were recorded: Brand A 1 12 9 13 11 14 Brand B 8 10 7 Use the rank-sum test with =0 .05 to test whether the claim is valid.
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