Read this example: test scores have fallen dramatically since caleb mitchell became senior class president; therefore, mitchell has done a terrible job as president. which logical fallacy does the example contain?

It contains "false-causality fallacy". 

The term false-causality depends on the mixed up supposition that since one occasion takes after another, the primary occasion caused the second one. The contention for the most part resembles this: Occasion A happened. Occasion B occurred after A. In this manner, B happened due to A. The false cause fallacy is some of the time compressed and exhibited under the mottos “correlation is not causation” and “sequence is not causation”.

False causality

Explanation:

well to answer ur question to be completly honest

answer; the above statement is (true);