b. What is the margin of error for this sample? The margin of error is "Round to three decimal places as needed.)c. Based on this sample, is there any evidence that this proportion has changed since 2007? Because the confidence interval found in part a the reported proportion from 2007, this sample evidence that this proportion has changed since then.A department of education reported that in 2007, 66% of students enrolled in college or a trade school within 12 months of graduating from high school. In 2013, a random sample of 160 individuals who graduated from high school 12 months prior was selected. From this sample, 102 students were found to be enrolled in college or a trade school. Complete parts a through c below. a. Construct a 90% confidence interval to estimate the actual proportion of students enrolled in college or a trade school within 12 months of graduating from high school in 2013. A 90% confidence interval to estimate the actual proportion has a lower limit of and an upper limit of (Round to three decimal places as needed.)