Students enrolled in an introductory statistics course at a university were asked to take a survey that indicated whether the student has a visual or verbal learning style. Of the 39 students who took the survey, 25 were judged to have a visual learning style, and 14 were considered verbal learners. Consider these 39 students to be a random sample of students at this university. Required:
a. Conduct a test of significance of whether these sample data provide strong evidence that more than half of all students at the university have a visual learning style.
b. Determine a 90% confidence interval for the population proportion who are visual learners at this university.
c. Write a sentence interpreting what this interval says.