Warunki wnioskowania na temat dwóch średnich

A teacher wonders if students who listen to music while taking an exam will score higher than students who don't listen to music. They have $10$‍ students listen to music and $10$‍ other students not listen to music on the same exam. The teacher wants to use a two-sample $t$‍ test to see if there is a significant difference between the average scores of the groups.