Problem #7 (Kozak Problem 8.1.4) (Multiple Choice) Suppose you compute a confidence interval with a sample size of 100. What will happen to the confidence interval if the sample size decreases to 80? A. Confidence interval will become wider if sample size is decreased B. Confidence interval will become narrower if sample size is decreased C. Sample size will become wider if the confidence interval increases D. Sample size will become wider if the confidence interval decreases Problem #8 (Kozak Problem 8.1.8) (Multiple Choice) In 2013, Gallup conducted a poll and found a 95% confidence interval of the proportion of Americans who believe it is the government's responsibility for health care. Give the statistical interpretation. A. "We estimate with 52% to 60% confidence that the true proportion of Americans who believe it is the government's responsibility for health care is between 0.52 and 0.60 (that is, between 52% and 60%)". B. "We estimate with 95% confidence that the true proportion of Americans who believe it is the government's responsibility for health care is 95%." C. "We estimate with 52% to 60% confidence that the true proportion of Americans who believe it is the government's responsibility for health care is 95%". D. "We estimate with 95% confidence that the true proportion of Americans who believe it is the government's responsibility for health care is between 0.52 and 0.60 (that is, between 52% and 60%)"