Answer to Question #331249 in Statistics and Probability for Ging

Question

 A random sample of 8 cigarettes of a certain brand has an average nicotine content of 4.2 milligrams and a standard deviation of 1.4 milligrams. I this in line with the manufacturer’s claim that the average nicotine does not exceed 3.5 milligrams?

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7. A taxi company is trying to decide whether the use of radial tires instead of regular belted tires improves fuel economy. Given the a number of samples, can we conclude that cars equipped with radial tires give better fuel economy than those equipped with belted tires?

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8. At a certain college it is estimated that fewer than 25% of the students have cars on campus.

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9. The proportion of men in the population afflicted with this blood disorder is significantly greater than the proportion of the women afflicted.

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10. A study is made to determine if a cold climate contributes more to absenteeism from school during a semester than a warmer climate.