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Five measurements of the tar content of a certain kind of cigarette yielded 14.5, 14.2, 14.4,...

Five measurements of the tar content of a certain kind of cigarette yielded 14.5, 14.2, 14.4, 14.8, and 14.1 mg/cig. Is the difference between the mean of this sample and μ=14.1 (as claimed on the packages) significant at α=0.05.

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