3. Constructing a Confidence Interval: Online Courses We noted that in a Sallie Mae survey of 875 undergraduate students, 55% take online courses. The sample results are n = 875 and f: = 0.55. {8 pts) Requirement Check a. Find the margin of error E that corresponds to a 90% confidence interval. b. Find the 90% condence interval estimate of the population proportion p. 0. Based on the results, can we safely conclude that more than 55% of undergraduates take online courses? d. Assuming that you are an online reporter, write a brief statement that accurately describes the results, and include all of the relevant information