Suppose that a survey about voting was conducted of 45 randomly selected individuals from Gainesville. The respondents were asked if they planned on voting in the next election. Thirty-five people said that they did plan on voting. Which of the following statements correctly describes how the confidence interval for the population proportion of people that plan on voting in the next election?
- There are not 15 successes and 15 failures. A confidence interval can be computed by adding 2 successes and 2 failures.
- There are not 15 successes and 15 failures. A confidence interval can not be done.
- There are not 15 successes and 15 failures. A confidence interval can be computed by adding 4 successes and 5 failures.
- There are at least 15 successes and 15 failures. A large sample confidence interval for the population proportion can be computed (phat +/- z * sqrt(p*(1-p)/n) with no additional values added.