Use a sign test to test this claim.
A researcher wishes to study whether music has any effect on the ability to memorize information. 83 randomly selected adults are given a memory test in a quiet room. They are then given a second memory while listening to classical music. 66 people received a higher score on the second test, 16 a lower score, and 1 received the same score. At the 0.05 significance level , test the claim that the music has no effect on memorization skills.