Use the output to answer the following questions:

a. What is the null hypothesis?

b. What proportion of people who are worried about losing their source of economic support said they voted in the 2012 election? What proportion of those who are not worried said they voted?

c. What is the difference in proportions? What is the z-score associated with the difference? What is the p-value associated with that z-score?

d. Assume that you were conducting a two-tailed test at an alpha-level of .05.

Would you conclude that the difference is “statistically significant”? Explain which p-value on the output allows you to answer this question.

e. Assume that you were conducting a one-tailed test at an alpha-level of .05.

Would you conclude that the difference is “statistically significant”? Explain which p-value on the output allows you to answer this question.

f. What is the 95% confidence interval for the difference in proportion between those who are worried and not worried about losing their main source of economic support?