Nicotine in Cigarettes Refer to Data Set 15 Cigarette Contents in Appendix B and assume that the

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Nicotine in Cigarettes Refer to Data Set 15 “Cigarette Contents” in Appendix B and assume that the samples are simple random samples obtained from normally distributed populations.

a. Construct a 95% confidence interval estimate of the mean amount of nicotine in cigarettes that are king size, non-filtered, non-menthol, and non-light.

b. Construct a 95% confidence interval estimate of the mean amount of nicotine in cigarettes that are 100 mm, filtered, non-menthol, and non-light.

c. Compare the results. Do filters on cigarettes appear to be effective?

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