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November 2022 1 3 Report
A random sample of 8 cigarettes of a Marlboro has an average nicotine content of 4.2 milligrams and a standard deviation of 1.4 milligrams. Is this I line with the manufacturer's claim that the average nicotine content does not exceed 3.5 milligrams? Use a 0.01 level of significance and assume the distribution of nicotine contents to be normal.

Determine the Critical Region

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