Answer:
a one-way between-subjects ANOVA
Step-by-step explanation:
The one-way between-subjects ANOVA is considered or known to be a kind of test is used in comparing many groups of participants which are not related in any way.
In this case, the professor that were comparing different participants from different classes of the college was making use of a one-way between-subjects ANOVA.
It should be noted that, ANOVA means Analysis of variance. And it was made or developed by a renowned evolutionary biologist Ronald Fisher.