Question 3 In a simple random sample of 1600 young people, 86% had earned a high school diploma. a. What is the standard error for this estimate of the percentage of all young people who earned a high school diploma? b. Find the margin of error, using a 95% confidence lėvel, for estimating the percentage of all young people who éarned a high school diploma. c. Report the 95% confidence interval for the percentage of all young people who earned a high school diploma. d. Suppose that in the past, 80% of all young people earned high school diplomas. Does the confidence interval you found in part (c) support or refute the claim that the percentage of young people who earn high school diplomas has increased? Explain. Edit Format Table В I U 12pt v Paragraph v A V 泉

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