In a simple random sample of 250 young people, 85% had earned a high school diploma. Complete the following parts (Round all answers to 2 decimal places.) a) What is the standard error for this estimate of the percentage of all young people who earned a high school diploma? (as a percentage). Answer: _% b) Find the margin of error, using a 95% confidence level, for estimating the percentage of all young people who earned a high school diploma. (as a percentage). c) Find the 95% confidence interval for the percentage of all young people who earned a high school diploma. d) Suppose that in the past, 78.23% 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. Answer: 0 The interval supports this claim. This is because 78.23% is not in the interval, and all values are above 78.23%. 0 The interval supports this claim. This is because 78.23% is in the interval. 0 The interval does not support this claim. This is because 78.23% is in the interval. 0 The interval does not support this claim. This is because 78.23% is not in the interval, and all values are above 78.23%