9.18 Opinion on fracking a year earlier The question about the opinion on the increased use of fracking from the November 2014 survey mentioned in Example 6 was also included in an earlier survey in September 2013. Using this earlier survey, let’s again focus on those who oppose the increased use of fracking.

a. Define the parameter of interest and set up hypotheses to test that those who oppose fracking in 2013 are in the minority.

b. Of the 1506 respondents in the 2013 survey, 740 indicated that they oppose the increased use of fracking.
Find and interpret the test statistic.

c. Report the P-value. Indicate your decision, in the context of this survey, using a 0.05 significance level.

d. Check whether the sample size was large enough to conduct the inference in part

c. Indicate what the assumptions are for your inferences to apply to the entire U.S. population.

e. Find the P-value for the two-sided alternative that the proportion opposing is different from 0.50.