Costco? you mean the grocery/supermarket that is around the corner
Answer:
There is a high positive correlation between sleep and exam performance.
Explanation:
The concept of correlation indicates an association, that is to say, it is used for measuring how much two variables relate to each other. The 3 results of a correlational study are positive, negative, and no correlation. A positive correlation takes place between 2 variables that can increase or decrease together. In this case, the more students sleep, the better they performed at their exams.
