A college chemistry instructor thinks the use of embedded tutors will improve the success rate in introductory chemistry courses. The passing rate for introductory chemistry is 62%. During one semester, 200 students were enrolled in introductory chemistry courses with an embedded tutor. Of these 200 students, 140 passed the course.

a. What is pn, the sample proportion of students who passed introductory chemistry.

b. What is p0, the proportion of students who pass introductory chemistry if the null hypothesis is true?

c. Find the value of the test statistic. Explain the test statistic in context.