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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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the transformation of their group from a dyad to a triad

Explanation:

In the scenario presented in the context, the relationship between Rebecca and Farah changed as Farah included her new friend, Alison to the group and did all the things or activities which Rebecca and Farah used to do together earlier.

The dyad group of Rebecca and Farah changed to triad when Alison was included in the group which affect the relationship between both the friends Rebecca and Farah.

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mars1129 [50]

i need the chart...      

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worty [1.4K]

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<u>Answer:</u>

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<u>Explanation:</u>

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Energy is usually transmitted from one organism of the ecosystem in the basic food chain of the ecosystem in the form of food via another life form of the ecosystem. Therefore, the energy is passed from one life form to the other life form through the food chain.

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Pani-rosa [81]

Answer:

The correct answer is: Democratic

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