Quinn wants to test his prediction, also known as a(n) that "lack of sleep increases the likelihood of lower test scores for college student."

Hypothesis  

Explanation:

Hypothesis is defined as the supposed explanation or reasoning that is raised for any particular idea.This proposed method is experimented and evaluated to investigate the validity and correctness of the wild guess or idea.

According to the question's situation, Quinn is making prediction that relate with a guess.Thus, his prediction falls in the category of hypotheses as its actual confirmation is yet performed through testing.

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