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Conditions for inference on two means

Problem

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.
Which of the following are conditions for this type of test?
Choose all answers that apply:
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