An interactive poll on the front page of the CNN website in October 2011 asked if readers would consider voting for Herman Cain,
a Republican presidential candidate. A statistics student used the information from the poll to calculate the 95% confidence interval. He got (0.53, 0.59). He also conducted a hypothesis test. He found very strong evidence that more than half of voters would consider voting for Herman Cain. To what population do these conclusions apply? A. They apply to all likely voters.
B. They apply to the population of those who visit the CNN website.
C. The results do not apply to any population because this was a voluntary response sample.
D. They apply to the population of those who visited the CNN website while the poll was on the front page.
The discontinuity occurs at x = 0, since that is the only "problem" place in the graph that makes the function undefined. A vertical asymptote exists there. It is nonremoveable.
