Determine the necessary sample size. 9. What is the approximate sample size required to estimate the percentage of Americans who have earned a college degree to within 2%, with 95% confidence? Recall:...

Extracted text: Determine the necessary sample size. 9. What is the approximate sample size required to estimate the percentage of Americans who have earned a college degree to within 2%, with 95% confidence? Recall: the worst-case scenario would assume that p = 0.5 a) 2401 b) 3382 c) 4145 d) 1692 e) 7156 Select the most appropriate response. 10. What will happen (other things being equal) if you decrease the confidence level for a given confidence interval?