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Darina [25.2K]
3 years ago
12

Professor Izadi is interested in determining the association between sleep and cognitive performance. He surveyed his students a

bout the number of hours they slept the night before an exam and then correlated these scores with their test grades. He found a .81 correlation between these two variables. What does this result mean?
Social Studies
1 answer:
I am Lyosha [343]3 years ago
5 0

Answer:

There is a high positive correlation between sleep and exam performance

Explanation:

Correlation studies the degree of association between two variables. A correlation coefficient of 0.5 to 1 is regarded as a strong correlation, that is an increase in one variable will result in an increase in the other variable. A correlation coefficient that lies between 0.3 to 0.49 is regarded as moderately correlated while a value of 0 means that there is no correlation.

Thus, the result of this study shows that an increase in sleeping time will result in better exam performance.

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