13. A sample of 20 cigarettes is tested to determine nicotine content and the average value observed
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13. A sample of 20 cigarettes is tested to determine nicotine content and the average value observed was 1.2 mg. Compute a 99 percent two-sided confidence interval for the mean nicotine content of a cigarette if it is known that the standard deviation of a cigarette’s nicotine content is σ = .2 mg.
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Related Book For 
Introduction To Probability And Statistics For Engineers And Scientists
ISBN: 9780125980579
3rd Edition
Authors: Sheldon M. Ross
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