7 (15 pts). A sample of 11 cigarette brands is selected and the total nicotine contents...
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7 (15 pts). A sample of 11 cigarette brands is selected and the total nicotine contents (in %) in the sample are listed below: 16.0 10.5 11.4 11.0 10.7 11.3 17.8 13.9 13.4 12.6 13.5 Assume that the total nicotine contents are normal distributed and let be the mean total nicotine content of all cigarette brands. (a) Find the best point estimate of the population and the margin of error associated with this estimate. (b) Construct a 90% confidence interval for u. (c) Summarize (b) in words. 7 (15 pts). A sample of 11 cigarette brands is selected and the total nicotine contents (in %) in the sample are listed below: 16.0 10.5 11.4 11.0 10.7 11.3 17.8 13.9 13.4 12.6 13.5 Assume that the total nicotine contents are normal distributed and let be the mean total nicotine content of all cigarette brands. (a) Find the best point estimate of the population and the margin of error associated with this estimate. (b) Construct a 90% confidence interval for u. (c) Summarize (b) in words.
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