1. Two newspapers report the results of the same Gallup Poll regarding the percentage of people who favor term limits for Senators. The first newspaper uses the poll to present a 95% confidence interval for this percentage, whereas the second newspaper presents an 99% confidence interval.

True or False: The confidence interval presented by the first newspaper will be wider than the interval reported by the second paper.

True or False: Increasing the sample size would cause the resulting confidence interval to be narrower.

2. In a simple random sample of 200 OSU undergraduates, 35 say they plan to go on to graduate school. Find an 90% confidence interval for the proportion of all OSU undergraduates who plan to go on to graduate school.

-Write a sentence interpreting this interval.

3. Eighty-one compact car engines of the same type are randomly selected using an SRS and independently tested by the EPA for nitrogen oxide emissions. The test results show an average of 1.3 grams per mile with a standard deviation of 0.64 grams per mile. Find a 95% confidence interval for the average grams of nitrogen oxide emitted per mile for this type of engine.