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[Solution Library] Nicotine in cigarettes . To determine whether the mean nicotine content of a brand of cigarettes is greater than the advertised value of

Question: Nicotine in cigarettes . To determine whether the mean nicotine content of a brand of cigarettes is greater than the advertised value of 1.4 mg, a health advocacy group tests

\[\begin{aligned} & {{H}_{0}}:\mu =1.4 \\ & {{H}_{A}}:\mu >1.4 \\ \end{aligned}\]



The calculated value of the test statistic is z =2.42.

a) Is the result significant at the 5% level?


b) Is the result significant at the 1% level?

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