is it bad to listen to music before a test?

is it okay to listen to music before a test? (IE: math, chem, physics)
My friend says that she never listens to any music before a big test… and her results show
but that can be just her belief

i heard classical music can help get a high test score.

are these true?
try to compare it with studying with music and without music.
do not factor in the amount or how intensely you studied.

Probably it can. But, usually it won’t. Only listen to music without lyrics in it. Lyrics can distract you from remmebering the information.