Pass rates for an Intermediate Algebra class at a community…

Pass rates for an Intermediate Algebra class at a community college are 52.6%. In an effort to improve pass rates in the course, the faculty develop a mastery-based learning model where the course content is delivered in a lab through a computer program.  The instructor serves as a learning mentor for the students.  Of the 480 students who enroll in the mastery-based course, 267 pass.  Based on this sample, is there enough evidence to suggest that the mastery-based learning model has improved pass rates at the  level?   What is the Test Statistic for this hypothesis test?