A country's education department roported that in 2015,61.7% of atudeats entollod in college of a trade school within 12 months of grabuasing high schocl in 2017 , a random sample of 151 individuals who graduated from high school 12 months prior was selected. From this sample, 90 shudents were lound to be enrobled in college or a rade school Corpilete parts a through c a. Construct a 90% confidence interval to estimate the actual propotion of students enfolled in colvege or a trade school within 12 months of graduating from Miph school in 7017 . The confidence interval has a lower linin of and an upper fimit of (Round to three decimal places ats needed.) b. What is the maigin of error for this sample? The matgin of error is (Round to three decknal places as needed) c. Based on this sample, is there any evidence that this proporfon has chanped since 2015 ? This sample ovidence fiat tha proporticn has changed shce 2015, since be