1 1. In a random sample of five people, the mean driving distance to work was 22.2 miles and the standard deviation was 5.8 miles. (a) Construct a 95% confidence interval for the population mean (b) What is the margin of error? (c) What is the sample mean? 12. In a survey of 4013 U.S. adults, 722 say they have seen a ghost. Construct a 99% confidence interval for the population proportion. 13. You wish to estimate, with 99% confidence, the population proportion of U.S. adults who think that foods containing genetically modified ingredients should be labeled. Your estimate must be accurate within 2% of the population proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 87% of U.S. adults think that foods containing genetically modified ingredients should be labeled