1. (15 points) Answer the multiple choice questions by selecting one choice. (a) Specific sample data is obtained for estimating a population proportion. Which is wider? The 90% confidence interval or the 99% confidence interval? Why is it wider? A. The 90% confidence interval is wider because it contains 100% - 90% = 10% of the true population parameters whereas the 99% confidence interval only contains 100% - 99% = 1% of the true population parameters. B. The 90% confidence interval is wider than a 99% confidence interval in order to be more confident that it captures the value of the population proportion. C. The 99% confidence interval is wider than the 90% confidence interval in order to be more confident that it captures the value of the population proportion. D. The 99% confidence interval is wider because it contains 99% of the true pop- ulation parameters whereas the 99% confidence interval only contains 90% of the true population parameters. (a) (b) What is a confidence interval used to estimate? A. The percent of population proportions that fall within the interval. B. The chance that a population parameters will fall within the interval. C, The population parameter. D. The percent of sample point estimates that fall within the interval. E. The sample point estimate. (b) C (c) What important feature is missing in the following scenario? A Gallup poll estimates the true proportion of teens without a FaceBook page is between 28% to 30% with 90% confidence A. The sample size. B. The confidence level. C. The confidence level limits or endpoints. D. The population parameter of interest. (c) continued on next page