In the 2010 General Social Survey, 1,298 randomly selected Americans were asked, "How many hours do you spend watching television each day?" Let denote the mean daily hours spent watching television for all Americans.

1. The 95% confidence interval obtained for was (2.32, 3.24). What is a correct interpretation of this interval?
2. Is it plausible that the true mean daily hours spent watching television for all Americans is 4.5 hours?
3. Decreasing the sample size has what effect on the width of a confidence interval?
4. Using the same data set to construct a confidence interval, a 90% interval will be