Answer:
He made a reasonable inference.
Explanation:
Rodriguez asked 60 randomly chosen students about their favorite types of reading materials.
Of those 60 students, 12 chose science fiction.
In percent this is about
%
Mr. Rodriguez drew an inference that about 20% of middle school students prefer to read science fiction.
We can see that this inference is correct. He made a reasonable inference as his sampling was non biased and completely random.