8.3.133: You plan to conduct a survey on your college campus to learn about the political awareness of students. You want to estimate the true proportion of college students on your campus who voted in the 2012 presidential election with 95% confidence and a margin of error no greater than five percent. How many students must you interview?

8.3.119. According to a recent survey of 1,200 people, 61% feel that the president is doing an acceptable job. We are interested in the population proportion of people who feel the president is doing an acceptable job. a. Define the random variables X and P in words. b. Which distribution should you use for this problem? Explain your choice. c. Construct a 90% confidence interval for the population proportion of people who feel the president is doing an acceptable job. i. State the confidence interval. ii. Sketch the graph. iii. Calculate the error bound.

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