* Type of institution: Students at four-year colleges and universities are more likely to graduate in four years than those at community colleges who often transfer.
* Major: Some majors, particularly those in STEM fields, often require more than four years to complete.
* Student demographics: Students from lower socioeconomic backgrounds, first-generation college students, and students with disabilities may face challenges that impact their graduation timelines.
* Full-time vs. part-time enrollment: Full-time students are much more likely to graduate in four years.
While some studies show graduation rates within four years hovering around 40% for all students at four-year institutions, this is a broad average and can fluctuate wildly depending on the factors listed above. A more precise answer would require specifying the institution, student population, and other relevant details.