A tobacco company advertises that the average nicotine content of its cigarettes is at most 14 milligrams. A consumer protection agency wants to determine whether the average nicotine content is in fact greater than 14. A random sample of 300 cigarettes of the company’s brand yields an average nicotine content of 14.6 milligrams and a standard deviation of 3.8 milligrams. Deter-mine the level of significance of the statistical test of the agency’s claim that μ is greater than 14. If a = .01, is there significant evidence that the agency’s claim has been supported by the data?
Answer to relevant QuestionsA psychological experiment was conducted to investigate the length of time (time delay) between the administration of a stimulus and the observation of a specified reaction. A random sample of 36 persons was subjected to the ...Refer to Exercise 5.36. In exercise a. Does there appear to be a relationship between reading time and reading comprehension of the individual students? Provide a plot of the data to support your conclusion. b. What are ...A company that manufacturers coffee for use in commercial machines monitors the caffeine content in its coffee. The company selects 50 samples of coffee every hour from its production line and determines the caffeine ...A Internet provider has implemented a new process for handling customer complaints. Based on a review of customer complaint data for the past 2 years, the mean time for handling a customer complain was 27 minutes. Three ...Faculty members in a state university system who resign within 10 years of initial employment are entitled to receive the money paid into a retirement system, plus 4% per year. Unfortunately, experience has shown that the ...
Post your question