Question: A poll of 1,200 voters asked what the most significant issue was in the upcoming election. Sixty-five percent answered the economy. We are interested in the population proportion of voters who feel the economy is the most important.
1. Define the random variable X in words.
2. Define the random variable P′ in words.
3. Which distribution should you use for this problem?
4. Construct a 90% confidence interval, and state the confidence interval and the error bound.
5. What would happen to the confidence interval if the level of confidence were 95%?