Quantifies the impact of time spent riding a bus on 4th, 6th, 8th, and 11th grade students' achievement based on data from a 1970 Statewide survey of Oklahoma students. The null hypothesis was tested that busing has no effect on student achievement. Findings revealed that at an .01 level of significance, bus riding time reduces achievement for 4th and 8th grade students. The effects of socioeconomic status, television viewing, and after school work on achievement were also tested. (JF)