Fifteen percent of Australians smoke By introducing tough laws banning
Fifteen percent of Australians smoke. By introducing tough laws banning brand labels on cigarette packages, Australia hopes to reduce the percentage of people smoking to 10% by 2018 (Reuters website, October 23, 2012). Answer the following questions based on a sample of 240 Australians.
a. Show the sampling distribution of p, the sample proportion of Australians who are smokers.
b. What is the probability the sample proportion will be within ± .04 of the population proportion?
c. What is the probability the sample proportion will be within ± .02 of the population proportion?

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