The nicotine content in a single cigarette of a particular brand has a distribution with mean 0.8 mg and standard deviation 0.1 mg. If 100 of these cigarettes are analyzed, what is the probability that the resulting sample mean nicotine content will be less than 0.79? less than 0.77?
Answer to relevant Questionsb. What is the probability that the sample mean is between 49.75 pounds and 50.25 pounds? c. What is the probability that the sample mean is less than 50 pounds? Suppose that the sampling experiment described in Example 8.1 had used samples of size 10 rather than size 5. If 50 samples of size 10 were selected, the x value for each sample computed, and a density histogram constructed, ...Discuss how each of the following factors affects the width of the confidence interval for p: a. The confidence level b. The sample size c. The value of p^ The article “Students Increasingly Turn to Credit Cards” (San Luis Obispo Tribune, July 21, 2006) reported that 37% of college freshmen and 48% of college seniors carry a credit card balance from month to month. Suppose ...The article “Hospitals Dispute Medtronic Data on Wires” (The Wall Street Journal, February 4, 2010) describes several studies of the failure rate of defibrillators used in the treatment of heart problems. In one study ...
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