Over the last decade, many Americans have been able to stop smoking. However, a recent survey suggests that asthmatic children are more likely to be exposed to second-hand smoke than children without...

Over the last decade, many Americans have been able to stop smoking. However, a recent survey suggests that asthmatic children are more likely to be exposed to second-hand smoke than children without asthma.19 In a random sample of 300 children without asthma, 132 were regularly exposed to second-hand smoke, and in a random sample of 325 children with asthma, 177 were regularly exposed to second-hand smoke. Is there any evidence to suggest that the proportion of children with asthma who are exposed to second-hand smoke is greater than the proportion for children without asthma?

A recent survey suggested that more than one-quarter of registered U.S. voters believe an armed revolution might be necessary to protect our liberties.20 In a random sample of 250 voters in Western states, 73 indicated that an armed revolution might be necessary, and in a random sample of 275 voters in Eastern states, 85 said that an armed revolution might be necessary. Is there any evidence to suggest that the proportion of voters in the West who believe that an armed revolution might be necessary is different from the proportion of voters in the East? Use Write a Solution Trail for this problem

In its Millennium Development Goals Report, the United Nations suggested that by the end of 2013 there will be 6.8 billion cell-phone subscription plans, and approximately 2.7 billion people will be connected to the Internet.21 A random sample of households in Brazil and Russia was obtained, and the number of people connected to the Internet was recorded for each. The data are given in the following table.