College Puzzle (no peeking)

Which college students learned more? A research team randomly assigns college students to take a math course in two ways:

a. Mostly on the computer, combined with one hour per week in-person with the instructor lecturing

or

b. Traditional 3 hour/week course with the instructor in-person

Which college students had higher pass rates or final-exam scores? The mostly online or the traditional?

Take a guess in the comments section. I'd guess too but I accidentally read the results already (there was no "spoiler alert" in the text).

I'll describe the full study later, though if you're impatient, a little Googling will tell you what happened.