Peer tutoring is an effective method of improving undergraduate students' academic performance, especially for those at-risk for poor grades. Peer tutoring has seldom been explored in undergraduate statistics, a difficult but required course for many college majors. The current study investigated the benefits of peer tutoring for 180 demographically-diverse undergraduate students enrolled in an introductory psychology statistics course at an urban public university. We investigated the predictive value of attendance at peer tutoring sessions for in-class examination performance. We also studied the role of help-seeking and self-efficacy. Results indicated that peer tutoring attendance was associated with higher grades for in-class examination among at-risk students. Help-seeking and self-efficacy were not associated with in-class examination scores. Peer tutors can help at-risk students increase scores in statistics courses. Departments offering undergraduate introductory statistics courses should allocate resources to allow for funding of peer tutoring programs.