This five-part report provides a compilation and analysis of data on student completion of courses at Mercer County Community College between summer 1979 and spring 1980. After an executive summary of findings, Part II provides background information on the study, which examined volume measures, such as credit hours, and success indicators, such as completion rates. Part III provides data on course completion rates, which were computed by dividing the number of students who received successful grades (A to D) by the number of students receiving successful grades plus the number of students who withdrew or did not complete the course. Completion rates by campus and semester are given for both day and evening students and for each department. Part IV presents the rank order of 100 courses according to the volume and efficiency measures of headcount enrollment, enrolled credit hours, earned credit hours, and credit hours not earned. Finally, Part V examines grade distributions in credit courses and student grade point averages (GPA's) by department, course discipline, and course. Findings, which are contrasted where possible with data from previous years, include the following: (1) completion rates fell from .77 in 1974-75 to .68 in 1978-79 and then registered a slight rise to .69 in 1979-80; (2) net departmental course completion rates ranged from .93 for Library to .61 for Math/Physics/Computer Science; and (3) the grade B was consistently the most commonly assigned grade. (HB)