Answer/Explanation needed! 9.7 Suppose that the manufacturer of UltraChic cigarettes claims that the average nicotine con-...
A cigarette manufacturer claims that the average nicotine content of their new brand XXX is at most 1.35 mg. It would be unwise to reject the manufacturer's claim without strong contradictory evidence. An appropriate problem formulation is to test A random sample of 100 brand XXX cigarettes are tested and the sample standard deviation and sample mean are found to be 0.07 mg and 1.361 mg, respectively. Assuming the central limit theorem applies and s ≈ σ, find the p-value...
The average amount of nicotine in a cigarette is about 12 mg (milligrams), but for your information, when you smoke a cigarette, you only consume about 0.95 mg. We assume that nicotine distribution in cigarettes is normal with standard deviation 1.5 mg. A cigarette manufacturer claims that it has reduced the amount of nicotine in its cigarettes. You the curious cat, actually go out and take a random sample of 50 cigarettes; you find that average amount is 11.7 mg....